Gas Fitter Practice · Question
Which type of gas valve is designed to be fully open or fully closed and should not be used for throttling gas flow?
Ball valves are quarter-turn valves designed for quick shut-off and should only be used in the fully open or fully closed position, not for modulating flow.
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Question: Which type of gas valve is designed to be fully open or fully closed and should not be used for throttling gas flow?
Answer options:
- Needle valve
- Globe valve ✅ Ball valve
- Diaphragm valve
Correct answer: Ball valve
Explanation: Ball valves are quarter-turn valves designed for quick shut-off and should only be used in the fully open or fully closed position, not for modulating flow.
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- What is the maximum allowed pressure for a propane system supplying a residential appliance?
- When installing a gas outdoor appliance, what is the minimum required clearance from an opening into a buildin
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