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GAS 2 LICENSE PRACTICE EXAM 2025 QUESTIONS AND ANSWERS 1. What are two main purposes of gas pressure regulators? - ....ANSWER ...-To reduce the supply main pressure to the house pressure and to maintain a constant downstream pressure regardless of the changes in flow rate. 2. What are three categories of gas pressure regs? - ....ANSWER ...-Service regs, system regs, appliance regs 3. What is the pressure setting on a relief device? - ....ANSWER ...-Not higher than the lowest rated item downstream of the relief device 4. Where is the hydrostatic relief valve used? - ....ANSWER ...-In a liquid propane system 5. What must the size of the vent piping from a relief device be? - ....ANSWER ...- Not less than the vent outlet size of the relief device 6. What are the four elements of a direct operated regulator? - ....ANSWER ...- Measuring element, loading element, restricting element, atmospheric vent 7. When flow rate increases through a regulator what happens to downstream pressure? ....ANSWER ...-It decreases ...©️ 2025, ALL RIGHTS RESERVED 1