Gas Fitter Practice · Question
What is the primary function of a thermocouple in a gas appliance?
A thermocouple converts heat from a pilot flame into a small electrical current, which holds open the gas valve, proving the pilot is lit.
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Question: What is the primary function of a thermocouple in a gas appliance?
Answer options:
- To measure ambient room temperature ✅ To sense the presence of a pilot flame and prove ignition
- To regulate gas pressure to the main burner
- To ignite the main burner electronically
Correct answer: To sense the presence of a pilot flame and prove ignition
Explanation: A thermocouple converts heat from a pilot flame into a small electrical current, which holds open the gas valve, proving the pilot is lit.
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Question explanations
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