TSSA G2 Exam with complete solution

On a pilot what causes a lazy yellow flame? - Dirty lint screen Primary air opening Orifice too big Main functions of a gas regulator? - Reduce and maintain downstream pressure.Pressure to appliance can be adjusted.Smooth and even flow. What does the measuring element do? - Measures downstream pressure. What is the restricting element? - Increases or decreases gas flow Loading element does what? - set operating pressure. What is the closing force in a regulator? - The downstream outlet gas pressure What is the function of a regulator vent? - Allow gas to escape in case of diaphragm rupture or downstream over pressure At the leak limiting orifice how much gas is allowed to leak in a one hour period? - 1 cu ft per hour. Surge limiting valve are used where? - Applications where regulators are required to be slow opening. Where is the service regulator located?And used to do what? - At the end of the utility's pipeline. It's used to reduce supply pressure to the building pressure.Appliance regulators serve what purpose? - The reduce the building pressure to the manifold pressure on the appliance. What is the system regulator?And what pressures does it bring it down to? - The regulator between the service regulator and the appliance regulator.From 125-5 psig What does a first stage regulator do, and brings it down to what pressure? - It reduces cylinder pressure down to supply line pressure.Reduces pressure from 250-375 psig down to 10 psig. Second stage regulator does what? And brings it down to what pressures? - It reduces supply line pressure to building pressure.Pressure reduced from 10 psig down to 11" w.c. Corrugated metal gas connector, connected to a range must not exceed - 6ft Black iron pipe 2 1/2 NPS at 150ft long shall be pressure tested to? - 1.5 times the maximum operation pressure for 180 minutes A manual shut off valve shall be installed - In either drop of riser of a residential appliance Buried piping or tubing shall be - Only copper type L coated, Type G coated, Type K uncoated Pressure drop - The difference in working pressure at the gas meter, and the working pressure at the appliance regulator