All questions

TSSA Gas Technician II Practice Exam

Browse all practice questions for the TSSA Gas Technician II Practice Exam. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

Start practice test Flash cards

All questions

These questions are part of the practice quiz. Start practicing

Maximum size of job fabricated welded fitting on a ten inch supply header
The prime component of a building as a system is what?
What is the capacity of a 6-inch vent after applying the 10% reduction?
Which statement best describes a manual shut-off valve?
Which statement about filtration in a building's HVAC system is true?
Which clause is used to size openings in enclosures?
What is the expected voltage output range for a thermopile or powerpile?
Draft hood type gas fired appliances are susceptible to which problem?
What is the unit of measurement for electrical resistance?
If a system regulator lacks internal relief, what device is required?
If the vent line extends beyond 50 ft (15 m), what action is required for the vent arrangement?
Air from the kitchen area can replace combustion air provided from inside. Which option shows this replacement?
Which feature is used in a liquid withdrawal method on a propane cylinder?
Unions and swing joints made by a combination of fittings shall not be used where piping is to be...
Incinerator venting may be vented into which types of chimneys?
What does a depressurization test determine?
Lower opening location should be located between which distance above the floor?
Which outcome is most likely if combustion air is restricted and makeup air is not provided?
Where are effective vapour barriers normally installed?
What percentage reduction occurs when three 90-degree elbows are used?
Which type of regulator on a propane barbecue is fully adjustable?
Which component uses the combined effects of temperature change and electricity and consists of a bimetallic strip joined at one end?
How should dryer exhaust ducts be joined?
Which action increases downstream pressure in a regulator system?
Air infiltration commonly results in increased heat loss. Which statement best describes this effect?
What is a purpose of the two-stage regulator system?
What is the required pipe size for section D?
Which option best describes the normal pilot flame characteristics?
Which appliances are not required to be connected to a vent or chimney?
What is the input rate of the duct furnace?
Which option is not a cost-effective measure to decrease fuel costs according to the material?
What term describes the difference between the OFF and ON operating temperatures associated with the aquastat?
Which factors are considered when selecting the correct gas regulator?
Manual motor-starting switches contain which of the following for sensing higher-than-normal currents drawn by the motor?
Type B vent may be used on furnaces equipped with which feature?
What is the minimum distance in feet between a propane tank and the property line for tanks over 5000 USWG when the value is 15 ft?
Propane cylinder on construction site must be equipped with which device?
Which regulator usage is indicated for the third example of high pressure usage with a low capacity regulator?
Which statement about the main switch's role is accurate?
Which of the following values is not a listed maximum vapour pressure for recreation vehicles?
Tables 8.3 - appliances having draft control or Table 8.4 - appliances not having draft control are used to size outdoor air supply for non-air tight structures.
What is the primary function of a gas regulator?
What is the required pipe size for section E?
If a heat loss calculation determines heat loss is 100,000 Btu/h, what size furnace should be installed?
What voltage range do thermocouples typically generate?
Which of the following is not a listed potential cause of spillage?
An appliance with a draft hood and an input of 325,000 Btu/h is installed in a structure that has an equivalent leakage area of 0.05 m2 at a differential of 10 Pa - What is the outdoor air supply opening required?
What is the effect of an anticipator set too high on the heating system?
An appliance input calculation from a natural gas meter test dial (2 cubic feet in 15 seconds) yields which Btuh?
Which item is a factor to consider when selecting the correct gas regulator?
What is the function of an overpressure or line relief device downstream of the regulator?
Which copper tubing option is acceptable for underground service?
What is another setting on a single stage propane regulator?
Which statement describes the thermocouple pilotstat coil test?
Which term describes the end of a thermocouple connected to the sensing element?
Which of the following is a pressure unit used in the data?
What is the acceptable round air supply duct size?
Which device is used to control gas pressure entering downstream piping?
How are circuit breakers installed?
The hydrostatic relief valve is used on which line to release excessive pressure caused by trapped liquid natural gas?
Thermostat terminals associated with the heating circuit of a gas-fired furnace are:
Which of the following is true regarding the use of a single wall vent connector through an unheated space?
If the main disconnect switch is open with a call for heat, how do the components behave?
Which agency for propane specifications is TSSA?
Which action increases downstream pressure?
What is the hot junction in a thermocouple?
Type D fuse stands for and where would it be used?
Which value is the lowest maximum vapour pressure on the list?
Which instrument measures amperage?
What is required on the vent line of a pressure regulator?
What is the resistance reading across an open contact?
What is the resistance reading across a closed contact?
For a vent with a diameter of 5 inches, what is its capacity when it is greater than 120 MBtu/h?
A diaphragm gas valve venting into a combustion chamber may be vented if which condition is met?
Which pair of temperatures are used to determine the temperature rise across a water heater?
Double layering the moisture barrier is a technique used to what?
What is the standard unit of measurement used to express appliance input in Btuh?
A low water cutoff is required when the boiler input is less than 400,000 Btuh and which condition is present?
What should be done to the orifice size when converting an appliance from natural gas to propane?
During lighting a barbecue, what position should the lid be in?
Maximum ampacity values for overcurrent protection devices are specified in which codes?
Where are thermocouples commonly used in safety systems?
Where is gas that has passed the regulator located?
An appliance with a draft control device and an appliance without a draft control device with a combined input of 300,000 Btu/h are installed in an enclosure that is air tight. What is the outdoor air supply opening required?
Natural draft appliances rely on which mechanism to draw combustion air and exhaust gases?
Which of the following is a differential or pressure drop value?
For appliances designed for a special venting system, which vent type is permitted?
The building as a system approach means understanding how ___________ is affected by occupants, the building and the outside environment.
What is the result of the third appliance input calculation?
Which of the following is NOT listed as an agency for propane specifications?
Which problem could cause hot boiler water but no heating when the circulating pump is moving?
Electric baseboard heating is described as which method?
Which is another purpose of the two-stage regulator system?
How are most service regulators classified?
Propane cylinder on construction site must be equipped with which of the following?
From a natural gas meter test dial, a half cubic foot in 20 seconds corresponds to which appliance input value?
What are wire conductors?
Which device generates a voltage when its junctions are heated?
Which factor is an indicator of gas meter usage related to safety?
If Type B vent is unavailable for the required installation, what vent may be used as a replacement?
Where is an overpressure or line relief device located upstream of the regulator?
Which of the following could cause undesirable flame characteristics?
Excess flow valve is used for which purpose?
Barbeque ignition methods can include which of the following?
Which device prevents the hydronic system from overheating by shutting off the burner at a high temperature?
Which statement correctly describes vent termination distance from a service regulator?
Cylinder re-examination and testing frequency includes which interval?
A depressurization test is used to estimate building air leakage by measuring...
What minimum ratio must be maintained between grounding area and flame rod?
Negative pressure is normally associated with which side of the building?
What is the final capacity for a 5 inch vent after applying the 10% reduction?
In a spark-ignition dryer, which device senses flame heat to de-energize the ignition spark?
Which option correctly completes: Vapour barriers are designed to ______ moisture in the building envelope according to the material?
Which conductor size is rated for use on a 30 amp circuit?
For vapour withdrawal, which connection option is used in one method?
Air from the kitchen area can replace combustion air provided from inside. Which option shows this replacement?
Which of the following is identified as a modern framing method in the material?
Which wire type is correct for metal studs?
Negative pressure in a building can cause problems for draft hood appliances by which condition?
What is the propane vapour pressure at 100.0 °F?
How is the anticipator wired in regards to gas valve and thermostat contacts?
Which sealing method is most effective for reducing air leakage around openings?
What is the differential or pressure drop across a diaphragm gas meter?
What wire type is most appropriate for metal studs?
LER for High Pressure side equals which value?
Which device is designed to interrupt current in the event of a ground fault?
Where should a GFCI circuit breaker be reset?
Which of the following is the largest listed outdoor air opening for draft-control appliances?
Which component provides high temperature limit control for the burner and plenum temperature control of the air circulating fan motor?
Gas billing is primarily based on the amount of gas consumed over a period. Which option expresses that concept?
What is the millivolt reading for drop-out condition?
Supply pressure from natural gas meter?
Which device prevents overpressure in a gas system?
Which aspects of gas meter usage are considered for billing and safety?
Which of the following protects against current flow to ground?
Which heat transfer mechanism involves energy transfer through direct contact between molecules in a solid?
What is the process of converting alternating current to direct current called?
In a 120/24V transformer, what is the typical primary voltage reading?
What is the input rate of each boiler?
For a range burner with a control valve located at the rear, what is required for installation?
Which factor can contribute to negative pressure in a building?
Where should the lower air supply opening be located relative to the floor?
Liquid propane piping
What does a closed-circuit test measure?
When may a single wall vent connector be installed in an unheated space?
How should the pressure regulator vent be vented according to the requirement?
For propane conversion, the orifice size is typically
What voltage is expected across the primary side of a 120/24V step-down transformer?
What are control relays?
Which opening size is listed as 2 inches for 125,000 Btu/h appliances without a draft hood?
What is the expected drop out voltage for a thermocouple?
What is the required method for bonding conductors?
Heat loss in a residential building is greatest through which element?
Between the first-stage and second-stage regulator, the listed propane vapour pressure limit is given as which of the following values?
The driving force behind stack effect is the difference in which property between indoor and outdoor air?
In the B149.1 Code, which table is used for non-air tight structures for appliances having draft control?
Gas meter test dial purpose
Outdoor air supply opening size for appliances without a draft hood and input of 125,000 Btu/h.
A relay is a magnetically-operated switch that operates on which principle?
Which pressure is the pressure on the gas side after the regulator?
Purging a cylinder before filling with propane primarily removes which substances?
Which value is listed as a differential pressure expressed in inches of water column?
Spillage is indicated when which of the following occurs?
Which test is used to measure air leakage by depressurizing a building?
In a gas safety system, which component is the electromagnet in the pilotstat?
For an appliance with a draft hood and 185,000 BTUH, what is the second smallest listed combustion/dilution air inlet size?
Which type of regulator on a propane barbecue is partially adjustable?
What is the size of the combustion/dilution air inlet for an appliance without a draft hood and an input of 235,000 BTUH?
What is the minimum distance above a flat roof that a vent must terminate?
What is the function of the minimum burner flame on oven control?
What is another setting on a single stage propane regulator?
What is the restricting element on a direct-operated regulator?
If a cylinder is filled to 100% liquid, what risk increases?
In a heat transfer path from boiler to room, which description accurately reflects the modes involved?
Which of the following is a listed cause of cold house with hot boiler water and circulating pump running?
For an appliance with a draft hood and 185,000 BTUH input, which listed size is 29 square inches?
Which control system takes the command away from the operating controls when continued operation would cause an unsafe situation?
BX is commonly used in residential, commercial, and industrial applications where wiring may be exposed to which of the following?
Attic insulation practices include which of the following to support energy efficiency and air sealing?
The flame sensor consisting of a tube constructed of quartz is commonly known as what?
Which category has more listed combustion/dilution air inlet sizes in the provided data?
Which statement describes the function of a low water cutoff?
Which statement correctly describes the pipe sizes for sections A through E?
The term 'building skin' refers to which of the following?
Most residential lighting and appliances operate on which voltage?
Which statement best describes the impact of negative pressure on draft hood appliances?
Which device is an example of an operating safety control?
Which listed outdoor air opening for appliances with draft control is 13 sq in?
Thermostats should be located how far from the floor?
A free-standing residential gas-fired range is characterized as which?
In sizing outdoor air openings, what is the key distinction between appliances with draft control devices and those without?
In a direct-operated regulator, which component is the measuring element?
Smallest permitted dimension for an air supply duct according to B149.1 Code, Clause 8.3.2.
Which standard is a relief valve requirement for cylinders? (B 149.1)
Which standard is a relief valve requirement for cylinders? (B 149.2)
An appliance with a draft hood and an input of 100,000 Btu/h is installed in a building that has an equivalent leakage area of 0.05 m2 at a differential of 10 Pa - What is the outdoor air supply opening required?
Which type of regulator is described as having an internal lock-off mechanism?
What is the vent diameter specified for a chimney with corrugated liner?
The furnaces described in the example have what AFUE rating?
What is a recognized method for testing gas piping before use?
Among the furnace sizes listed in the example, which is the largest?
In the combustion and ventilation air openings size examples, which of the following is a listed lower opening free area?
Which value is closest to 150 psig among the propane vapour pressure values?
What is the recommended relative humidity range for homes?
What component ensures there is adequate flow to prevent damage by shutting down boiler operation when flow is too low?
Direct vent appliances use a sealed combustion system to draw air from outside for combustion. Which statement is true?
A residential mid or high efficiency furnace or power vented water heater works on which power supply?
In a hot water radiator system, the primary mechanism for transferring heat from circulating water to the surrounding air is which?
Installing a water softener helps prevent which issue in water heating systems?
Switch rating is determined by what?
Which is a permanent propane installation requirement involving safety devices at the appliance?
If HW supply temperature is 160°F and CW incoming is 100°F, the rise is:
Which statement about gas meter bypass is correct?
What tables in the B149.1 Code are used to size air supply to an enclosure or structure that has an equivalent leakage area of 0.05 m2 at a differential of 10 Pa?
Vent connector material must have corrosion resistance at least equivalent to which specification?
Which measure is least effective on its own for preventing backdrafting hazards?
What does SPDT stand for?
What is the purpose of a regulator?
Which statement best describes a true property of a mechanical combustion air intake arrangement?
Where should the upper air supply openings be located within the space?
Which option represents a common maximum liquid-fill percentage for propane in a cylinder?
In vapour withdrawal methods, which option is used for a connection?
Schedule 80 piping requirement
The pressure reference for draft hood context is expressed as what sign and unit?
What is the effect of increasing temperature on copper wire resistance?
During a thermocouple open circuit test, what condition is essential for a valid reading?
If the test dial reads 3 cubic feet in 15 seconds, what Btuh value does this correspond to?
What describes a decorative appliance?
Which feature is required on the vent line of a pressure regulator?
Millivolt readings - Open circuit (alternative)
Which device distributes electrical power to various circuits?
What draft device is required for an incinerator?
Which measure is listed as a cost-effective option to reduce fuel costs?
The low gas-pressure switch opens when gas pressure falls to what fraction of the regulator setpoint?
Which vent diameter is common to both a 5 ft lateral single-wall metal vent and a chimney with a corrugated liner?
How long should a gas range operate before calibrating the oven temperature control?
Which component is described as a backup safety switch in a heating system?
Which gauge thickness is allowed for vent connectors for incinerators?
Air leakage is most likely to occur how?
Which statement about vent lines on storage tanks is correct?
What is the required size of the air supply opening for a 1,500,000 Btu/h appliance?
Limit and safety controllers respond to changes in what, and do what as a result?
Which statement describes the proper use of a manually operated damper?
Which statement correctly pairs ignition type with maximum hose length for a gas-fired barbecue?
In a propane regulator, which pressure is a closing force?
Which action would be least effective in limiting stack effect?
Which device protects against low water by measuring water level and shutting down the boiler when it falls low?
Vapour withdrawal on a propane tank uses which type of thread?
Which statement describes the temperature rise calculation?
Which of the following statements about the maximum vapour pressures is true?
When does a low gas-pressure switch open?
What should be done to the orifice size when converting an appliance from natural gas to propane?
Which statement describes a Thermopile?
What is the open circuit output of a thermocouple?
If the main disconnect switch is open, what is the behavior of the components?
Which gases are used by a welder for cutting steel pipe?
Maximum length of a metal connector for a suspended heater
Which of the following is the millivolt reading associated with closed-circuit testing?
Which regulator setting is NOT listed as a propane regulator setting in the data?
The input rate of each boiler is
Under what gas pressure condition are gas-pressure switches required by code on burner systems?
Which component is used to switch the dryer motor from start to run?
Another gas meter test dial purpose
Backdrafting risk is influenced by which condition?
How are operating controls shown on schematic diagrams?
What is the function of balancing valves in a heating loop of a combo system?
Which description best matches a radiant heater installed in a masonry fireplace?
A hot water boiler requires a low water cutoff when the boiler input is below a safety threshold. Which condition mandates a low water cutoff?
Which component is commonly targeted first to reduce air leakage?
Switches can be actuated in response to changes in:
What is the equivalent length of a four inch forged tee?
The common setting for a high-limit aquastat is which temperature?
What is the Cold Junction in a thermocouple?
An operating aquastat that controls the temperature of the water inside the boiler is an SPDT switch normally open that does what?
When to purge a gas line
From the following, which list contains unacceptable fittings?
Vapour barriers are designed to prevent moisture from leaving the interior. Which of the following best matches this statement?
What does a combustion safety control monitor to determine whether gas should be allowed to flow?
Millivolt readings - Drop-out (alternative)
Which outdoor air opening size corresponds to a draft hood appliance with an input of 125,000 Btu/h in the specified airtight enclosure?
A system regulator bypass may be performed for which of the following reasons?
Which of the following is NOT a listed requirement for propane cylinders on construction sites?
Which is a typical relief valve setting for a propane tank?
Purging gas lines
Where should limit and operating controls be placed on schematic/ladder diagrams?
Combustion air provided from inside the building is replaced by which of the following?
Which pair of tables is used for non-air tight structures according to the second cited set?
What is the main reason for using a gas pressure regulator?
What is the maximum gas pressure allowed in an assembly building?
A manually operated flue damper in a residential dwelling requires which safety feature?
In which type of boiler would you expect to find a flow switch?
Which statement reflects vaporization factors?
Which value is listed as another propane vapour pressure value?
What is the primary effect of a bathroom exhaust fan?
What would an indication of voltage drop across a closed switch suggest?
Millivolt readings - Open circuit (another alternative)
The minimum aperture size of a combustion air inlet screen is
Under which condition must a line pressure regulator be of the positive shut-off type?
Apertures in a fixed louver or grille shall have no dimension smaller than how many inches?
Which heat transfer mechanism requires a moving fluid to carry energy from one place to another?
Which is another common relief valve setting for a propane cylinder?
Which type of convection occurs due to buoyancy forces when a fluid's natural movement transports heat?
Ventilation air inlet requirement for category one appliances located mid - point between any two appliances.
Which statement best describes the mantle's effect on flame color?
Which statement about stack effect is true?
What is the Low Pressure Total Input in Btuh?
Combustion air provided from inside the building is replaced by which of the following?
As part of vaporizer system requirements, which adjustment is listed?
Which statement about conductor resistance and length is true?
What occurs in the stacking effect within a water heater storage tank?
Stack effect causes air to move primarily through openings at which location?
Which option corresponds to a valid minimum rectangle fresh air intake size?
Fresh air ducts in modern houses primarily provide which function?
Where are effective vapour barriers normally installed?
Wet and dry bulb temperatures are used to determine which property?
Which type of regulator is described as having an internal lock-off mechanism?
What is the maximum negative building pressure for a draft hood appliance?
Another requirement for a vaporizer in a propane system is to:
What is the vent height for a venting system?
What is the recognized minimum aperture size of a combustion air inlet screen?
Refillable cylinder manufacturing requirements are in accordance with CAN/CSA-B339 and which Transport Canada regulation?
What is the anticipator in a mechanical thermostat designed to do?
Which value is listed as an appliance input calculation in the examples?
Which statement about gas dryer venting is correct?
All regulators should be certified and properly sized to provide the required flow across the extremes of inlet pressures.
What is the expected drop out voltage for a thermocouple?
Type L vent usage is described as which of the following?
What is the relief valve setting on a propane cylinder?
Filtration best describes the process of which of the following?
Which statement best describes humidity readings when using the wet/dry bulb method?
What filling methods are acceptable for a propane cylinder?
Infrared scanner cell material used in the system is which of the following?
Which device is an example of a combustion safety control?
What must be used in the capillary tube for high temperature sensing control elements?
What is another setting on a single stage propane regulator?
Which device is an example of a limit or safety controller?
Another gas meter test dial purpose
Which of the following is a relief valve setting for a propane cylinder?
Which statement about #14 AWG copper wire is true when compared to #14 AWG aluminum wire?
Which statement best describes a Powerpile?
What is the voltage for hot surface igniters that light the main burner?
What is the common thermocouple output value for both open-circuit and closed-circuit configurations?
What is the stated minimum pump cycle frequency for a combo system according to the notes?
Purging ensures that the cylinder is free of what before filling?
Which of the following is a listed lower opening free area in the combustion and ventilation air openings size options?
The windward side of a building will normally experience which pressure condition?
During a service call for a pilot outage, if a thermocouple shows an open circuit reading of 30 mV, a closed circuit reading of 15 mV, and a dropout of 2 mV, what action is indicated?
Which option is a traditional framing method listed in the material?
What type of vent is required when a recessed wall furnace is installed in a partition?
To reduce heat loss through infiltration, which action is appropriate?
For an appliance without a draft hood and input of 235,000 BTUH, which is the largest listed size?
What is the required pipe size for section C?
How is the single vent line area determined for gas overpressure relief devices?
On which type of gas-fired equipment would you typically find a rod and tube sensing device?
Combustion and dilution air requirements are normally supplied by
Which code clause governs the minimum duct size for air supply ducts in this context?
Which statements are acceptable for filling a propane cylinder?
A power venter certified for use as an add-on to a water heater may be used on a water heater with an input of which Btuh?
What is the purpose of venting a separate relief line to the outside?
Which standard is a relief valve requirement for cylinders?
Another requirement for a vaporizer in a propane system is to:
Which of the following is listed as a potential energy efficiency measure?
When air supply is provided by mechanical means, into which circuit shall an air flow sensing device be wired?
If you have appliances with draft control devices and appliances without draft control devices in an air tight structure or enclosure, what tables are used to size air supply openings to the outdoors?
Relative humidity level should be which range in a home?
In open-circuit testing, which millivolt value is specified?
Wet bulb temperature is defined as which of the following?
Not less than that of the largest draft-control device outlet or the largest flue outlet, plus 20% of the sum of the outlet areas of the additional appliances is the definition of what?
Within how many seconds must the thermocouple cool and de-energize the safety shut-off valve after a flame failure?
Which statement describes a plausible arrangement for a mechanical combustion air intake?
Exfiltration air leaving the building as replacement air is an example of replacement air for combustion from inside. Which option shows this?
What is the primary purpose of sealing exterior openings against air leakage?
BX cable is best described as which of the following?
Exfiltration air leaving the building is a replacement for combustion air provided from inside. Which option reflects that replacement?
Which option is NOT listed as a susceptibility for draft hood type gas-fired appliances in the material?
Gas meter shipping position requirement
What is the purpose of a mantle on a gas lamp?
What is a stated purpose for a gas meter bypass?
Which of the following is a cylinder re-examination interval?
Where should wire connections be made according to the rule described?
How is the High Pressure LMR calculated?
What term describes the resistance to heat flow through a boundary or material?
What is the length of the lateral vent connector?
Which statement best describes orifice sizing when converting from natural gas to propane?
What is the area of openings required for a furnace room?
Which of the following is a listed open-circuit reading for thermocouples?
Under which conditions should a propane cylinder be purged?
Heat transfer from the hot water in the system to the pipe wall occurs mainly by which mechanism?
Which instrument would you use to measure current in a circuit?
If a regulator is bypassed, what is a likely consequence?
Which fill level is considered a standard maximum for liquid propane in a cylinder?
For an appliance without a draft hood and an input of 235,000 BTUH, the combustion/dilution air inlet size is which of the following?
What effect can an excessive number of lava rocks or briquettes have on a barbecue's burner?
What is the free area of the upper opening in the combustion and ventilation air openings size examples?
Where are effective vapour barriers normally installed?
A gas meter bypass should be used primarily to
Under which circumstances should a propane cylinder be purged?
Which regulator type is designed to include a lock-off feature to prevent gas flow when disconnected?
Which control device operates on the principle of being a semi-conductor?
To ensure proper gas flow across a wide range of conditions, the regulator should be designed to provide the required flow across what range?
Which term describes a regulator that acts by moving the diaphragm directly in response to upstream pressure?
Which of the following is not a listed appliance input calculation result?
What is a thermocouple?
What are fuses or circuit breakers?
What is the maximum spacing of supports for NPS 1¼ gas pipe in a home?
Which term describes a regulator that can be adjusted to set the output pressure over a range?
During the first stage of a two-stage gas valve system with a two-stage thermostat, at what firing rate does the valve open?
In mechanical air supply scenarios, into which circuit should the air flow sensing device be wired?
The rod and tube sensing device is typically found on which type of equipment?
Is bypassing a pressure regulator allowed?
Smallest permitted dimension for an air supply duct according to B149.1 Code, Clause 8.3.2.
For an appliance designed for a special venting system, what venting is permitted?
For an appliance without a draft hood and input of 235,000 BTUH, which of the following is a listed combustion/dilution air inlet size?
Maintaining sealed air boundaries primarily serves what purpose?
A line pressure regulator must be of the positive shut-off type when the inlet supply pressure exceeds which threshold?
What is the millivolt reading for open-circuit thermocouple measurement?
Fans used to provide combustion air must be interlocked with which of the following?
Which value represents a differential pressure drop of 1.0 inches of water column?
Which device generates a small voltage when heated due to dissimilar metals?
Which statement best describes a valid vent line design for a pressure regulator?
Which value is the second lowest maximum vapour pressure on the list?
Which statement about vent line requirements is true?
Which statement best describes where a hydrostatic relief device is placed in relation to the regulator?
What is the minimum recommended frequency for the cycle of a combination system pump?
What characterizes a digital programmable thermostat?
How many basic types of low-water cutoff switches are there?
A vaporizer in a propane system is required to:
Draft hood installation location is described as which of the following?
Which heat transfer mode can operate without any physical medium between source and destination?
Which statement describes a Thermopile?
What is the minimum distance in feet between a propane tank and the property line for tanks over 5000 USWG when the value is 25 ft?
The term 'Trial For Ignition' refers to what?
Where is the anticipator connected in relation to the thermostat's R, W, and Y contacts?
If an appliance regulator is defective, what is a possible consequence?
What is the pressure relief valve setting on a propane tank?
Which standard specifies relief valve requirements for cylinders?
Which insulation material color is commonly specified in modern codes as pink fiberglass insulation?
Which action increases downstream pressure by turning the regulator spring counterclockwise?
Which statement best describes a free-standing residential gas-fired range?
What is the minimum size in square inches for a rectangle fresh air intake?
What is an additional requirement for attic insulation?
Which statement is most accurate about heat transfer modes in typical heating systems?
For a 50,000 BTUH water heater, what is the minimum clearance from the flue outlet to grade level?
In the thermocouple open-circuit reading data, which range is listed as 10-20 MV?
Which term describes a regulator that cannot be adjusted and maintains a fixed outlet pressure?
Which of the following statements about draft hood appliances under negative pressure is true?
For a CSA-approved combination system, what is the minimum water heater size?
What is the time range for operating a gas range before calibrating the oven?
In high-temperature sensing capillary tubes, which substance is used?
Which formula corresponds to 1 gpm per 1,000 BTUH input?
Draft hood type gas fired appliances are susceptible to which problem?
In a hot water radiator system, heat moving from the radiator surface into the surrounding air is primarily by which mechanism?
What tables in the B149.1 Code are used to size air supply to an enclosure or structure that complies with clause 8.2.1 (a) or (b)?
What is the purpose of a low-water cutoff switch?
Compared with copper, how does #14 AWG aluminum wire perform in current-carrying capacity?
Which device acts as an operating safety control to prevent boiler water temperature from exceeding safe levels?
In permanent propane installation requirements, which statement about regulators between tank and appliance is correct?
Which statement best describes the range of minimum water heater sizes listed for CSA-approved systems?
Which is a permanent propane installation requirement about regulator stages?
Which of the following is a cylinder re-examination interval?
Which statement best describes the advantage of a circuit breaker over a glass plug fuse?
Which statement best captures multiple possible causes of a hot water complaint?
Control relays are electrically-operated switches that use electromagnets or solenoids to open and/or close several different circuits at the same time.
Which value is NOT listed as an appliance input calculation value?
Which term is related to thermocouples but not specifically defined?
Which statement about circuit breaker terminals is true?
Which wire gauge has the smallest diameter in the listed data?
What is the definition of an indoor swimming pool heater?
Moisture exhaust duct sections on a dryer are held together using which method?
What is the millivolt reading for closed-circuit measurement?
Which of the following represents the recommended maximum percentage of a cylinder's volume that should be filled with liquid propane?
What is the minimum distance between a moisture exhaust duct and a service regulator?
If the total input is 200,000 Btuh, what is the required air opening size per 8.2.6?
Control relays are designed to open and/or close several circuits at the same time using which mechanism?
A residential mid or high efficiency furnace or power vented water heater operates on which type of power supply?
As temperature increases, what happens to current flow through a thermistor?
Which of the following is a closing force in a pressure regulator?
For direct vent appliances, which statement best describes the location of the ventilation air inlet?
During purging, which pair of contaminants is removed from a propane cylinder?
Temperature rise across a water heater is defined as the difference between which two temperatures?
What is the function of the Honeywell fan/limit control switch?
In a two-stage gas valve system, what is the firing rate during the second stage?
Which component operates on the principle of being a semi-conductor and is commonly used as a simple rectifier in control circuits?
Which option places Upstream pressure as the closing force at the last position?
The 'stack effect' experienced in buildings can be limited by which option?
Ventilation air inlet requirement for category one appliances located between 6\" - 18\" from the floor.
During closed-circuit testing, the expected millivolt reading is which of the following?
In duct installation, what is the role of wire mesh?
Which of the following is another propane vapour pressure value?
Which statement about draft hood appliances under negative pressure is true?
Which labeling convention is recommended for relay contacts?
How is an appliance vent connector attached to the draft hood or flue collar?
What risk can occur if the anticipator in a thermostat is bypassed at the gas valve?
If HW supply temperature is 135°F and CW incoming temperature is 55°F, what is the temperature rise?
According to the electrical code, where must wire connections be made?
Which term indicates high pressure usage for a low capacity regulator?
What type of current is conducted through the flame when voltage is applied between two flame rods?
What is the minimum distance in feet between a propane tank and the property line for tanks over 5000 USWG when the value is 10 ft?
Which statement describes devices that impair combustion or venting?
How long should a gas range operate before calibrating the oven temperature control?
How many distinct combustion/dilution air inlet sizes are listed for an appliance with a draft hood and input of 185,000 BTUH?
What is the vent size for a 120 MBtu/h appliance with three elbows?
How is 240 volts obtained for a residential 240 volt air conditioner from a residential service panel?
Before bypassing, what should be done?
Another requirement for a vaporizer in a propane system is to:
Which formula is used for pump sizing in water heater combos, as listed in the second rule?
Which statement accurately describes the difference between direct current (DC) and alternating current (AC)?
How should the thermocouple combustion safety control connection to the gas valve be tightened?
What is the minimum water heater size recommended for a CSA-approved combination system?
What is the maximum allowable over-sizing of a masonry chimney relative to the appliance it vents for a gas-fired appliance?
What is the minimum aperture size for a combustion air inlet screen?
True or False: For draft-control appliances, the outdoor air supply opening is determined by the combined input.
Where should the T&P valve be located within the storage tank?
What is the required pipe size for section B?
Which of the following is also a purpose of the two-stage regulator system?
What is an advantage of control circuits on millivolts?
Which statement correctly describes the purpose of T & P valve operation?
Which device among the listed has the smallest input rate?
Which of the following describes the function of a magnetic field in an armature system?
Where is a voltmeter connected when testing voltage drop?
What is the primary function of vapour barriers according to the material?
Which factor most directly affects the risk of backdrafting in a house with gas appliances?
In winter, ventilation air tends to do which of the following to relative humidity?
What is the recommended installation side for vapour barriers according to the material?
Which method is appropriate to attach a vent connector to the draft hood or flue collar?
What is the effect of increasing current on the magnetic field around a conductor?
What are electrical service measurement units?
Which voltage reading indicates a healthy closed circuit in a thermocouple?
What is the effect of an anticipator set too low on heating system?
Which of the following is a relief valve requirement standard other than CAN/TSSA-B340?
What is a permissible minimum distance for a tank over 1000 USWG from the property line, adjacent concrete or masonry building wall with no openings within the specified clearances, or a source of ignition?
Which option corresponds to a regulator setting of 14 inches of water column?
What is the term for air moving from the interior of a building to the outdoors?
What prevents the water in a hydronic heating system from boiling into steam?
Which withdrawal method uses hoses rated at 100 psig?
For venting, a gas-fired appliance should be located as close as practicable to which feature?
Another requirement for refillable cylinders is which Transport Canada regulation?
According to the options provided, which construction method is considered modern by the material?
Which components are included in a combination gas control valve?
Air supply inlet from outdoor shall be located not less than how many inches above grade level?
Which option is described as the method most commonly used by modern builders?
What is the base capacity of a 6-inch vent before the reduction?
What is indicated when an appliance with a draft hood has spillage?
The building skin includes which elements?
When water heaters are installed in parallel, what device is installed to ensure equal water flow through the heaters?
Duct tape is described as which type of method for holding duct sections?
In permanent propane installation requirements, which statement is true?
Which device measures energy consumption?
Which option lists the largest among the listed minimum rectangle fresh air intake sizes in square inches?
What is the calculation for the 6-inch vent capacity after applying the 10% reduction, given a base capacity of 186 MBtu/h?
Which of the following is the best option to prevent lime deposits?
Which vent diameter has a base capacity of 186 MBtu/h?
Which of the following is a listed relief valve setting for a propane tank?
Which item is a potential fault that could lead to heat not being delivered despite hot boiler water and running pump?
What size conductor is required to bond gas piping systems to the building's electrical system grounding conductor such as a cold water pipe?
What is the effect of winter ventilation on moisture in the air according to the material?
What is the best method of ventilating a structure?
Which is a typical relief valve setting for a propane cylinder?
Where is an inline ammeter connected when testing current draw?
A magnehelic gauge can be used to measure which of the following in a structure?
Which standard is another relief valve requirement for cylinders?
Between which two components is a minimum clearance specified to avoid moisture-related issues?
For an appliance with a draft hood and 185,000 BTUH input, which is the largest listed combustion/dilution air inlet size?
The radiator can emit heat directly to objects in the room without touching them by which mechanism?
Which condition is likely caused by negative pressure in a building affecting draft hood appliances?
What does the term 'spillage' mean in the context of venting a water heater?
Which differential temperature is specified for safety when a heat exchanger reaches an unsafe temperature?
Modern building contractors normally build using
What condition allows current to be conducted through the flame when using two flame rods?
Where should a vent connector size change location be made?
What is the adjusted capacity for a 5- inch vent when three elbows are used?
The table used to size air supply openings based on total input of appliances with draft control is which table?
What is the required side clearance from combustibles for a pendant type gas lamp?
A mercury bulb mechanical thermostat with one heating and one cooling stage is an example of which switch type?
The difference between High Pressure Total Input and Low Pressure Total Input is?
Which device has contacts rated for light duty and typically carries only small currents?
Which statement best describes the relationship between appliance input and the required outdoor air opening for draft hood appliances in an airtight structure?
Relief valve communication in propane cylinder must have direct communication with spaces which of the following?
Which statement about direct vent ventilation inlet requirements is false?
Among the furnace sizes listed in the example, which is the smallest?
Which item is listed as a potential problem with a thermocouple?
What is the primary purpose of the anode in a storage tank?
Outdoor air supply opening size for appliances without a draft hood and input of 125,000 Btu/h.
Which orientation should be avoided when shipping a gas meter?
Which of the following is a listed open-circuit reading for thermocouples?
What does an electric utility meter record?
Direct-vent appliance definition
Which rating applies to a single-family dwelling boiler?
Which action helps prevent premature burner burn-out in a barbecue?
Which formula is correct according to the rule of thumb pump sizing for water heater combo systems?
Maximum size welded fitting on ten inch header
Which value is the largest among the listed Btuh values?
When heat can be transferred by more than one mode in a heating system, which combination best describes this scenario?
Which of the following describes a replacement for combustion air provided from inside the building?
Which device among the listed has the highest input rate?
In a typical home, which statement about voltages is true?
Which of the following is listed as a construction method option in the material that is not balloon construction?
Which statement best differentiates a control relay from a contactor?
What material should be used to join dryer exhaust ducts?
Another vapour withdrawal method uses which feature on the withdrawal valve?
Which instrument measures resistance?
What is the purpose of a mixing valve on a combo system?
Which factor most influences the effectiveness of a combustion air inlet screen?
What is the primary purpose of the regulator vent line?
An appliance without a draft control device and an input of 150,000 Btu/h is installed in an enclosure or structure that is air tight - What is the outdoor air supply opening required?
Which feature describes the ability to shut off flow positively in propane regulators?
Which statement best describes the rule for manually operated dampers?
In the shower temperature example, what is the measured drop in water temperature?
Which of the following is not listed as a barbeque ignition option?
Which code covers the installation of propane appliances on vehicles?
Which statement correctly describes the thermistor's behavior as temperature rises?
Which statement best describes a hazard associated with pressure-induced backdrafting?
What is the other maximum number of 100-pound propane cylinders allowed on a construction site?
Which is a permanent propane installation requirement about regulator stages?
Diaphragm gas valve venting into combustion chamber may be vented under which condition?
Thermostats used in the heating industry can be rated for which voltage categories?
In ductwork, what is the role of wire mesh?
Clause 8.3 governs outdoor air supply openings for loads above which rating?
Which term describes a junction associated with micro currents in thermocouple applications?
Lack of makeup air causes which of the following?
Where is an overpressure relief device located relative to the regulator?
When a relay labeled CR is energized, what will occur?
Which type of regulator is described as having an internal lock-off mechanism?
Head pressure is measured in which unit?
In maintaining a water heating system, which method is recommended to prevent lime deposits?
If two dip tubes are installed in a water heater, what is the likely outcome for hot water supply?
What capability do certain Honeywell fan/limit control switches have?
Which of the following is the required air supply opening for 1 boiler?
Normal pilot flame characteristics describe which of the following?
Which option is NOT a standard maximum fill level for liquid propane in a cylinder?
In CSA Mod 22 reference, how is capacity determined for a 10 ft height and 5 ft lateral?
Upper openings location: where should they be located relative to the room's ceiling and draft control device?
If a domestic clothes dryer is not drying properly even with a clean lint screen, what is a common cause?
Draft hood type gas fired appliances are susceptible to which problem?
Which wire size is rated for use on a 15 amp circuit?
What is the combined purpose of the two-stage regulator system?
What is a plausible minimum dimension for a combustion air inlet screen?
What fitting is required when a vent connector enters a lined masonry chimney?
In a hydronic heating system, what is the primary purpose of a low water cutoff?
For an appliance with a draft hood and 185,000 BTUH input, which of the following is listed as a combustion/dilution air inlet size?
Which practice directly addresses air leakage and heat loss?
Which device senses steam pressure?
Which action is listed as a potential thermocouple problem?
Which type of regulator has an internal lock-off mechanism?
In a propane regulator, which pressure is the closing force?
What does HRV stand for in ventilation technology?
If the main disconnect switch is closed, how do the components behave?
For appliances with draft control, the outdoor air supply opening should be considered based on the combined input.
Effective vapour barriers are normally installed on which side of insulation?
An appliance with a draft hood and an input of 125,000 Btu/h is installed in a building that has an equivalent leakage area of 0.05 m2 at a differential of 10 Pa - What is the outdoor air supply opening required?
What is the calculation for the capacity of a 5-inch vent after applying the 10% reduction, given a base capacity of 122 MBtu/h?
In a heat exchanger, what differential triggers an unsafe temperature condition?
Which of the following is a potential problem cited for thermocouple issues?
Which statement about venting gas dryers is correct?
Which statement about the provided data is true?
Which heat transfer mechanism can transfer energy across a vacuum without a medium?
For an appliance with a draft hood and an input of 185,000 BTUH, what is the combustion/dilution air inlet size?
Which device shuts down the boiler when water is too low?
Which statement about ventilation air inlet requirements for direct vent appliances is true?
Flue and ventilation effect in a building refers to which phenomenon?
Air leakage is more likely to occur through which areas?
What is the major factor when determining the location of a combi unit?
Which conductor size is rated for use on a 20 amp circuit?
What does a pressuretrol sense?
What minimum distance from the grade level should be maintained from a 50,000 BTUH water heater flue outlet?
Which unit is used to express appliance input calculations in the examples?
What is the primary purpose of a building's exterior skin?
Which of the following is a technique used to enhance moisture control in building envelopes?
What is the isolation requirement for millivolt circuits?
Which device interrupts current when overload occurs?
Which measurement is described by a thermometer with a wet wick around its bulb?
An inline ammeter is connected across the component to measure current draw. Where is it placed?
The sizing of outdoor air supply openings for loads over 400,000 Btu/h is governed by which clause?
Ventilation air inlet requirement for direct vent appliances located between 6\" - 18\" from the floor.
Purging a propane cylinder before filling is primarily intended to remove which substances?
Which type of switch is used to transition a dryer motor from starting to running mode?
Armoured cable (AC) is often referred to as...
What type of valve is used on oxy-acetylene hoses to prevent backflow?
Which of the following is a listed appliance input calculation value?
What is the result of the second appliance input calculation?
How many B149 codes are presented in the material?
Air-supply openings shall not be located within how many feet of a moisture exhaust duct?
For direct vent appliances, where should the ventilation air inlet be located?
What is the required size of the outdoor air supply opening for 400,000 Btu/h?
Smallest permitted dimension for an air supply duct according to B149.1 Code, Clause 8.3.2.
A single wall vent connector may pass through a ceiling under which condition?
What is the closed circuit output of a thermocouple?
What is the required vent diameter when three elbows are used?
Which fastening method is required to secure a domestic gas dryer exhaust duct?
What happens to relative humidity when the indoor air is heated?
Which statement about air infiltration levels in a building is true?
Which condition triggers a low water cut off requirement on a hot water boiler?
Condensation of water vapour in combustion products or flue gases is true or false?
Which area is one of the most important to seal against air leakage to improve energy efficiency?
Which of the following represents a possible minimum rectangle fresh air intake size?
What is a sign of high humidity in a room with multiple occupants?
Which statement best describes a drop-out test for a thermocouple pilotstat coil?
What is the maximum propane vapour pressure limit between first-stage and second-stage regulators as listed in the standard?
What is a primary function of a gas regulator?
Where are vapour barriers typically placed relative to insulation in the material?
What does the stacking effect in a storage water heater refer to?
Which option best represents all factors that can cause elevated CO2 levels in a home?
Gas appliances combustion safety requires which of the following?
Which statement correctly describes vent-line requirements for a regulator?
What is an atmospheric vent on a direct-operated regulator?
What unit is used to express the system input values?
Dry bulb temperature is defined as?
Ventilation air brought into a building in winter will
What function does a fire stop serve when installed with a B vent system used as a common vent?
Another requirement for a vaporizer in a propane system is to:
What is the unit used to express appliance input calculations in the examples?
Outdoor air supply opening required for appliances without a draft hood and input of 125,000 Btu/h.
Millivolt readings - Closed circuit (alternative)
Gas piping can be used as a ground only as part of a flame safeguard circuit.
Natural draft appliances rely on which mechanism to move combustion air and exhaust gases?
Which device is similar to a relay but contains large-load contacts designed to control large amounts of current?
Which withdrawal method uses a male thread on the withdrawal valve?
Which pump sizing formula yields 10 gpm per 10,000 BTUH input?
Labeling of relay contacts should be:
Which statement about venting for a combination oil/gas appliance is true?
Schedule 80 piping requirement
Building codes now require that all new homes are constructed with which items?
In a propane regulator, which pressure is the closing force?
In a closed hydronic system, what effect does increasing system pressure have on the boiling point of water?
Which joining method is prohibited for dryer exhaust ducts?
Which device is designed to control large amounts of current with large-load contacts?
What is the input rate of each furnace?
Another gas meter shipping position requirement
A low water cut off is required on a hot water boiler when the input rating is greater than which Btuh?
Where should a separate relief line be vented?
What is the function of a high-limit aquastat in a heating system?
Ventilation air inlet requirement for category one appliances not required.
For an appliance with an input of 110,000 BTUH, what is the minimum vent distance from a non mechanical air supply?
The sensing material for rod and tube water heater control valves can be composed of which?
Plug fuses are also known as screw-base or Edison-base fuses. Type P is used in standard applications. What does type D stand for and where would it be used?
Which of the following is a plausible relief valve setting for a propane tank?
In a common chimney venting arrangement, which placement is correct for gas-fired and liquid-fuel appliances?
Which statement correctly describes a domestic hot water appliance installed in an isolated enclosure?
Circuit breaker terminal types vary how?
When converting an appliance from natural gas to propane, how should the orifice size change?
Moisture buildup in a building is directly related to which factor?
What is the effect of the minimum burner flame setting on oven temperature?
Liquid withdrawal on a propane tank uses which thread?
An appliance without a draft control device and an input of 200,000 Btu/h is installed in an enclosure or structure that is air tight - What is the outdoor air supply opening required?
Which combination is used to determine humidity in HVAC practice?
Which issue could cause a cold house with hot boiler water and circulating pump running due to a safety switch?
What is a likely cause of a cold house when the boiler water is hot and the circulating pump motor is operating?
The windward side of a building will normally experience which type of pressure?
Which type of regulator on a propane barbecue is non adjustable?
Where must the lower air supply openings be located in the enclosure?
Which value is a listed appliance input calculation in the examples?
Which factor most directly increases thermal resistance of a building component?
In the High Pressure LMR calculation, what is the base LMR value before adding the elbow term?
Who determines the dip tube length for a water heater?
Outdoor air supply opening size for appliances without a draft hood and input of 125,000 Btu/h.
Which outdoor air opening size is required for a non-draft-control appliance with an input of 150,000 Btu/h installed in an airtight enclosure?
Indication of high pressure usage for a low capacity regulator corresponds to which term?
Indication of high pressure usage for a low capacity regulator corresponds to which term?
The building envelope is best described as which of the following?
In a thermocouple open circuit test, which statement best describes the required condition for a valid reading?
Which feature is required on a propane cylinder used on a construction site?
A high gas-pressure switch opens when gas pressure exceeds what threshold?
In the combustion and ventilation air openings size examples, what is the free area of the upper opening?
Which of the following is NOT an example of a limit or safety controller?
Which statement best describes the role of the mechanical system in a building?
What is the Total System Input in Btuh?
Type 'L' vent usage may be used in lieu of which vent types?
What is the minimum top clearance from combustibles for a domestic gas range?
Outdoor air supply opening required for appliances with draft control.
Can gas piping be used as an electrical ground in a gas installation?
Which test is used to verify the millivoltage at which the pilotstat coil no longer holds the valve open?
Which statement about the two-stage regulator system is true?
Which outdoor air opening size is listed as 9 inches for 125,000 Btu/h appliances without a draft hood?
Which agency for propane specifications is Transport Canada?
What is the most effective method to prevent lime deposits in a water heating system?
Among the following, which describes a typical mechanical combustion air intake requirement?
Which device includes a pressure regulator as part of its assembly?
What does an open-circuit test measure in a thermocouple arrangement?
What tables in the B149.1 Code are used to size an outdoor air supply to an enclosure or structure that is air tight?
What is the purpose of the main switch?
Which of the following is described as a traditional framing method in the material?
Which is a permanent propane installation requirement about regulator stages?
What is described as a manual shut-off valve?
If HW supply temp is 100°F and CW incoming temp is 40°F, the temperature rise is:
If a building is under negative pressure, which issue is commonly observed with draft hood appliances?
Incinerator venting options are described as which of the following?
An appliance requiring venting shall be located as close as practicable to which feature?
Relief valve communication in propane cylinder shall have direct communication with which spaces at all times?
Two-stage regulator system helps maintain gas pressure as tank pressure changes. Which statement is true?
Draft hood type gas fired appliances are susceptible to which problem?
Which is the lowest propane vapour pressure value listed in the data?
Which action best reduces energy loss due to air leakage?
Copper tubing used for underground service shall be?
Which system is explicitly listed as a building code requirement for new homes?
Which action increases downstream pressure by turning the regulator spring clockwise?
What advantage does a circuit breaker have over a glass plug fuse?
What is the vent diameter specified for a 5 ft lateral single-wall metal vent?
What is the primary purpose of gas meters in residential service?
Head pressure in a piping system refers to which concept?
Another gas meter test dial purpose
An appliance that uses indoor combustion air is not considered what type of appliance?
What is a common setting for a high-limit aquastat?
A domestic gas dryer exhaust duct must be secured using how many sheet metal screws?
Maximum number of 100 pound propane cylinders on a construction site?
What is the maximum approved hose length for a gas-fired barbecue using a standing pilot?
Which code number is associated with the second listing of code covering installation of propane appliances on vehicles?
The input rate of each furnace is.
In gas meter terminology, which term describes measuring the flow of gas through the meter over time?
Which statement is true regarding purging propane cylinders?
Which statement reflects a design goal for vapour barriers mentioned in the material?
Indication of high pressure usage for a low capacity regulator corresponds to which term?
As temperature increases, what happens to the resistance of a thermistor?
Which statement best reflects a common characteristic of vapour barriers as described?
What happens to the resistance of a conductor as its length increases?
Which gas meter shipping position is NOT listed?
Which withdrawal method uses a standard water pipe fitting?
Which instrument measures voltage in a circuit?
A gas meter should be shipped in which orientation to minimize damage?
Another liquid withdrawal method uses what connection?
What term describes the time permitted to establish ignition?
Where should the T&P valve be located in the storage tank?
Which arrangement yields 240 V for a residential air conditioner from the service panel?
What is the function of the temperature and pressure relief valve (T&P valve) on a storage tank?
Thermocouple dropout voltage is typically in which range?
What does the notes specify about the rule of thumb pump sizing formula for water heater combination systems?
Combustion air provided from inside the building is replaced by which of the following?
Purging is required when a cylinder has just been purchased.
Which term describes converting alternating current to direct current?
What is the minimum distance in feet between a propane tank and the property line for tanks over 5000 USWG if no minimum distance is specified?
How are limit controls shown on schematic diagrams?
Which option represents a required characteristic of a mechanical combustion air intake?
The effective flue area must be not less than which of the following?
Can a gas-fired appliance and a liquid-fuel-fired appliance be vented into a common chimney, and if so, how are the vents arranged?
Which of the following lists contains the two maximum numbers of 100-pound propane cylinders allowed on a construction site?
Which condition is listed as a probable cause of a cold house with hot boiler water and the circulating pump running, indicating a control issue?
Which area is typically prioritized for sealing to improve energy efficiency?
Which of the following is the required air supply opening for 3 boilers?
What is a bimetal?
Which statement about duct tape is true?
Which statement about preventing lime deposits is true?
Thermostat cycling frequency: For best results, how many times per hour should the furnace cycle?
What is the highest maximum vapour pressure listed?
What is the minimum electrical service panel rating in most new residential construction?
Which of the following best describes a potential risk of improper combustion air provision?
Which statement accurately describes lime deposit prevention?
Which statement best reflects the scope of the B149.1 Code tables for outdoor air sizing in non-air tight structures?
How should you set an adjustable anticipator in a thermostat?
Which material is used in an infrared scanner cell?
Which agency for propane specifications is listed first in the given list?
Which statement best describes how limit controls are depicted on schematic diagrams?
Which statement correctly describes outdoor air supply openings for appliances with draft control?
What is the effect of a narrow differential setting on temperature control and burner cycles?
If manifold pressure is improper, what is a possible outcome?
What is a setting on a single stage propane regulator?
What is the free area of the lower opening in the combustion and ventilation air openings size examples?
The hot water storage tank rating is required to be what?
Which code number is associated with the third listing of code covering installation of propane appliances on vehicles?
Which regulator type is NOT listed as having an internal lock-off mechanism in the material?
Condensation of water vapour in combustion products or flue gases occurs under certain boiler designs.
One of the most important areas to seal against air leakage and improve heat loss is which of the following?
What is the expected closed circuit voltage reading for a thermocouple?
Fuse size is determined by which of the following
Which code number is associated with the first listing of code covering installation of propane appliances on vehicles?
A vaporizer in a propane system is required to:
The installation of electric baseboard heating describes which method?
Which device is used to prevent overheating by detecting an over-temperature condition and then cutting fuel supply?
Another gas meter shipping position requirement
Which practice best reduces the risk of backdraft when using gas appliances in a building?
Under what condition may a gas-fired appliance and a solid-fuel appliance be vented into a common chimney?
What indicates the flow direction on a gas pressure regulator?
Which of the following lengths is a listed maximum for a metal connector for a suspended heater?
Metal screws are described as which method for securing duct sections?
What type of vent is required for a combination oil/gas fired appliance?
Which switches are contained in a typical combination high-limit/fan control switch?
Which value is the lowest maximum vapour pressure listed?
What is the name of the first weld pass when welding a fitting to a pipe?
What is the minimum distance plastic piping or tubing must be installed under a commercial parking lot?
Which of the following is a valid factor in determining the outdoor air supply opening for draft-control appliances?
Which statement describes appliances not required to vent to a chimney?
What happens to the magnetic field when current increases?
Which component operates on the principle of being a semi-conductor and is used as a simple rectifier?
What is the maximum length of a corrugated metal connector for a gas range?
Which component is described as controlling the operation of electrical circuits?
Vent size adjustment for three 90 degree elbows
What is the maximum vapour pressure in recreation vehicles?
Occupant usage in a building can cause which of the following changes?
What is the input rate of each unit heater?
Which statement describes a Powerpile?
When drawing schematic/ladder diagrams where should you place limit and operating controls?
Which is the highest propane vapour pressure value listed in the data?
A flame sensor described as a quartz tube is commonly called what?
How often should a gas lamp be cleaned?
Which value correctly represents the boiler rating for a single-family dwelling?
Which statement about condensation in flue gases is accurate?
A thermocouple consists of what element at one end?
Which component uses the combined effects of temperature change and electricity and involves a bimetallic strip joined at one end?
Besides pickling vinegar, which chemical can be used to delime a water heater tank?
Who determines the dip tube length for a water heater system?
Low water cut off is required on a steam boiler when the input rating exceeds how many Btu per hour?
What is the pre-use inspection requirement for a barbecue each season?
What are the switch positions and where is the switch typically located?
Which millivolt reading corresponds to 'Open circuit (another alternative)'?
Which pilot type is automatically lighted each time there is a call for heat?
Which statement best describes the location of upper air supply openings?
Outdoor air supply to a single water heater is not required for an input up to how many BTUH?
The hydrostatic relief valve is used on which type of line to release excessive pressure caused by trapped LNG?
A major area to seal against air leakage to improve heat loss is which of the following?
Which voltage is used by large home appliances such as ranges and dryers?
What is the purpose of a hydrostatic overpressure or line relief device located upstream of the regulator?
Which of the following best describes a resistance reading across a closed contact?
Which statement describes a compliance requirement for a mechanical combustion air intake?
Which type of regulator on a propane barbecue is low level adjustable?
Which is the largest minimum water heater size listed for a CSA-approved combination system?
Which feature must be installed upstream of a line pressure regulator?
Which conversion is correct for 10 L/s to CFM?
For an appliance without a draft hood and 235,000 BTUH, what is the smallest listed combustion/dilution air inlet size?
Which outcome is described as a possible effect of winter ventilation on humidity in the air?
What is the High Pressure Total Input in Btuh?
Vent termination distance rule from a service regulator is described as which of the following?
What distance must the flame envelop on the thermocouple tip?
In which boilers would you typically find a flow switch?
Which control system sequences the safe light-up of the burner system when safe conditions are indicated by limit controls?
Which statement describes AWG 18?
Which organization determines specifications for propane cylinders?
What causes stack effect?
Draft hood installation is permitted under which condition?
In the B149.1 Code, which tables cover outdoor air supply sizing for non-air tight structures?
How is excessive downstream pressure controlled by a service regulator?
Outdoor air supply is not required for a single water heater when the input is up to 40,000 BTUH. True or False?
Which of the following can cause elevated CO2 levels in a house?
What does an open contact indicate when measuring resistance?
Which component is used to regulate gas flow from a cylinder to an appliance?
Which value is the second-highest listed maximum vapour pressure for recreation vehicles?
Which pair of temperatures are used to calculate the temperature rise across a water heater?
Deliming a water heater tank can involve using muriatic acid in addition to which substance?
Which fitting is required at the point where a vent connector enters a lined masonry chimney?
Method of testing gas pipe
What is the standard voltage drop across a closed switch under normal conditions?
20 L/s is equal to how many cubic feet per minute (cfm)?
What is the maximum number of cylinders?
Which of the following actions would best reduce heat loss caused by air leakage?
The vent connector material must have corrosion resistance equivalent to which standard?
In a liquid withdrawal method, which connector is used?
What is the result of the first appliance input calculation?
A propane cylinder on a construction site must be equipped with which of the following?
A masonry chimney venting a gas-fired appliance may not exceed the appliance capacity by more than what percentage?
Which option is listed as a gas meter test dial purpose?
Which of the following is not a standard maximum fill level for liquid propane in a cylinder?
Which option is a representative size for a rectangle fresh air intake in square inches?
What is required for venting of a pressure regulator to ensure safety?
Which term is described as a thermocouple related item that is not a junction type?
A voltmeter is connected across or in parallel with the component to measure voltage drop. Where is it connected?
As part of vaporizer system requirements, which adjustment is listed?
In a propane regulator, which pressure is a closing force?
What is the minimum ventilation air specified for a master bedroom?
Which device is typically used as an operating safety control to prevent unsafe pressure conditions?
Millivolt readings - Drop-out (alternative)
Which of the following is the correct pump sizing rule for water heater combo systems?
Liquid propane piping
Select the rule that uses 1 gpm per 1,000 BTUH input.
A 50,000 Btu/h water heater requires an air supply opening of how many square inches?
What is the required pipe size for section F?
Which option best describes the function of a draft hood on an atmospheric furnace?
Which construction option is identified as a modern method of framing in the material?
As described in typical safety guidelines, which condition triggers a low water cutoff?
Which device monitors the flow rate and can shut down the boiler if flow is too low?
Which option describes a safety-related feature in propane systems?
What is a primary purpose of purging a propane cylinder before filling?
Probe and float type low water cut off switches are considered to be
What is the function of a draft hood on an atmospheric furnace?
Which wire gauge is listed as carrying the most current?
Which action increases downstream pressure?
A magnehelic gauge measures which parameter in a building's air system?
Which statement is true about bathroom exhaust fans?
Vent size for 120 MBtu/h appliance with 5 ft lateral connector
The flame enveloping distance of 3/8 to 1/2 inch corresponds to how many millimeters?
Where are air filters usually located?
Which of the following represents the minimum height above grade level for an outdoor air inlet?
What is the boiler rating for a single-family dwelling?
Heat loss in a residential building is greatest through
What is the measuring element on a direct-operated regulator?
Which scenario is described by the thermocouple pilotstat coil test?
Building with improper insulation levels could contribute to which outcome?
Air infiltration levels in a building can be influenced by multiple factors. Which statement accurately reflects this?
The temperature rise across a water heater is defined as which of the following?
Which value is not listed as a differential pressure value in the data?
What is the maximum appliance input for which thermocouples are approved?
Which factor affects the vaporization rate of a propane container?
What is the required size of the air supply opening for a 50,000 Btu/h water heater?
Which device provides protection against overpressure for a line regulator?
Which of the following are listed as causes of spillage?
Which diameter vent corresponds to a capacity of 122 MBtu/h before reduction?
Armoured cable is commonly referred to as BX. What does BX stand for?
Which term best describes energy transfer via electromagnetic waves emitted by a hot object?
What is the required pipe size for section A?
Which of the following is a cylinder re-examination interval?
The code requires that a mechanical combustion air intake be interlocked with which component?
What is the equivalent length of a four inch forged tee?
Which of the following is the minimum water heater size recommended for a CSA-approved combination system?
Low Pressure LMR value?
When sizing air supply openings using the total input of all appliances, which table applies?
Which regulation governs the transport of dangerous goods in Canada?
The equivalent length of a four inch forged tee is approximately:
Which organization is associated with propane cylinder specifications in the set of agencies?
As more occupants enter a room, relative humidity levels do what?
In regulator terminology, which pressure is commonly referred to as the downstream or outlet pressure?
What is the stated purpose of T & P valve operation?
Which of the following is stated about vapour barriers in relation to moisture movement?
What does Btuh stand for?
Which of the following is a framing method listed in the material?
What is the minimum dimension for fixed louver or grille apertures?
What describes a domestic hot water appliance?
Smallest permitted dimension for an air supply duct according to B149.1 Code, Clause 8.3.2.
What wire type is most appropriate and cost effective for a residential basement?
In a spark-ignition dryer, which component de-energizes the ignition spark?
Which statement correctly describes the temperature rise concept?
What is the function of an overpressure relief device located downstream of the regulator?
Millivolt readings - Drop-out (another alternative)
Lack of makeup air can be the result of which of the following?
Vent capacity for 5 inch diameter vent
What is an electric meter?
Outdoor air supply opening required for appliances without a draft hood and input of 125,000 Btu/h.
Which of the following describes energised and de-energised positions for schematic contacts?
What is the pressure relief valve setting on a propane cylinder?
If spillage occurs in a draft hood appliance, what does this indicate about the chimney condition?
Which action increases downstream pressure?
Which of the following could be a minimum rectangle fresh air intake size?
Which of the following describes a feature of some Honeywell fan/limit control switches?
Installing two dip tubes in a water heater would likely result in what?
When connecting a domestic appliance to rigid piping with a flexible metal connector, where should the shutoff valve be placed?
A continuous pilot is defined as which type of pilot?
Which conversion is correct for 20 L/s to CFM?
Which statement best describes the relationship between the listed regulator types and internal lock-off mechanisms?
Piping on vehicles must be sized, tested and purged in accordance with which code?
Switch rating is described as:
What is the minimum aperture size of a combustion air inlet screen?
A cost-effective method of decreasing fuel costs is to
A line pressure regulator in a gas system must include which protection device?
The dip tube length should be long enough to terminate at which level?
Which reading is not listed among the expected open-circuit thermocouple values?
Which are the two basic types of LWCO switches?
Where should a GFCI receptacle be reset?
Rod and tube water heater control valve sensing material options include which among the following?
In wiring diagrams, what does 'at rest' indicate?
According to Clause 8.2.6, what is the size of openings required per 1000 Btuh of total input?
Tables in the B149.1 Code used to size outdoor air supply for non-air tight structures for appliances having draft control or not having draft control.
Which component allows isolation of the regulator for maintenance?
What is the required shipping position for a gas meter?
Which statement correctly describes makeup air in relation to building pressure?
What wire type is most appropriate for moisture conditions?
Which of the following scenarios yields an outdoor air opening of 36 sq in?
In the data, which unit is used to express the pressure drop across a gas meter, i.e., inches of water column?
How can an exhaust fan affect gas appliance operation?
What is the delivery pressure of the regulator?
Which statement best describes the overall purpose of the two-stage regulator system?
What is the primary purpose of a ground fault circuit interrupter (GFCI)?
Where must the vent diameter increase take place for a regulator with internal relief if the vent line extends beyond 50 ft (15 m)?
An appliance vent located on a flat roof is 4 feet away from a new addition which extends 6 feet above a flat roof. The minimum vent height for the new vent will be:
Which of the following is a propane vapour pressure value of 172.0 psig?
What color insulation is commonly associated with pink fiberglass insulation?
Which of the following represents the maximum number of cylinders?
What is the maximum liquid-fill percentage for propane in a cylinder?
Which statement is listed as a design goal for vapour barriers in the material?
What is the maximum approved hose length for a gas-fired barbecue using a piezo ignition?
Which is a permanent propane installation requirement?

Get the latest from Examzify