TSSA Gas Technician II Practice Exam

Liquid withdrawal relies on a flexible hose assembly that is designed for the gas service and can handle the pressure involved. The connector used is hoses rated at 100 psig, because this rating ensures the hose and fittings can safely contain the gas or LPG during withdrawal, provide a proper seal, and accommodate some movement without stressing rigid components. Other options aren’t appropriate for the withdrawal connection: a POL thread is tied to cylinder valve connections rather than the withdrawal hose, standard water pipe fittings aren’t designed for gas service and may not seal or withstand the intended pressures, and a male thread on the withdrawal valve describes a component rather than the actual safe, compatible hose connector needed for the withdrawal method.