Gas 2 License Practice Exam Questions with Latest Update
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Course
Gas Master
Institution
Gas Master
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...
Gas 2 License Practice Exam Questions
with Latest Update
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
8. What materials are regulators bodies made of? - Answer-Cast aluminium, cast iron,
steel
9. What controls the downstream pressure in a regulator? - Answer-The loading
element
10. What is a zero governor connected to? - Answer-An air-gas mixer in a burner
system
11. What type of regulator arrangement is required in propane installation? - Answer-
Two stage
12. Will gas flow be interrupted by changing a propane cylinder if an automatic
changeover regulator is used on the installation? - Answer-No
13. What five factors need to be considered before selecting a regulator? - Answer-Rate
of flow, type of gas, inlet gas pressure, outlet gas pressure, pipe size
14. Is operating temp a factor when installing propane cylinders in a system? - Answer-
Yes
, 15. Should the arrow on a regulator point upstream? - Answer-No, it should point in the
direction of flow
16. What is the maximum allowable pressure downstream of a pressure controlling
device? - Answer-Lowest maximum pressure rating of downstream equipment,
regulators or piping.
17. What are the most commonly used over protection devices? - Answer-Relief valves,
monitors, auto shut offs
18. Does a relief valve decrease a regulators capacity? - Answer-No
19. What measures the system pressure when using a direct operated relief valve? -
Answer-A diaphragm
20. What types of overpressure protection incorporate a restricting element? - Answer-
Direct operated relief valves and internal relief valves
21. Does an auto shut off automatically reset? - Answer-No
22. Which pressure applications are automatic shutoff valves designed for? - Answer-
Low and high pressure
23. Name two types of displacement meters? - Answer-Diaphragm meter and rotary
meter
24. Which meter corrects for temperature and pressure? - Answer-The base volume
index (BVI)
25. Which meter displays the correction factor on a brass tag? - Answer-The pressure
factor measurement (PFM)
26. BPI PFM AND BVI do not correct test dials - Answer-
27. If the pressure of a gas increases and its temp remains constant what happens to
the volume? - Answer-It decreases
28. If the temp if a gas increases and its volume remains constant what happens to the
pressure? - Answer-It increases
29. If the temp of a gas increases and its pressure remains constant what happens to
volume? - Answer-It increases
30. What are test dials on a meter use for? - Answer-To determine input to appliances
and to indicate any downstream leaks in the gas piping
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