Gas Fitter Practice · Question
Which component is designed to prevent gas flow to a burner if the pilot light or main flame fails?
A thermocouple generates a small electrical current that keeps the gas valve open; if the pilot goes out, the thermocouple cools, closing the valve.
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Question: Which component is designed to prevent gas flow to a burner if the pilot light or main flame fails?
Answer options:
- Pressure regulator ✅ Thermocouple
- Solenoid valve
- Gas cock
Correct answer: Thermocouple
Explanation: A thermocouple generates a small electrical current that keeps the gas valve open; if the pilot goes out, the thermocouple cools, closing the valve.
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