Industrial Maintenance Technician Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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If a resident's gas furnace blower frequently turns on and off but heat still comes out, what should you investigate?

Worn faucet seat

Faulty thermostat

Investigating a faulty thermostat is crucial in this scenario because the thermostat controls the operation of both the furnace and the blower. If the thermostat is malfunctioning, it may cause the blower to turn on and off erratically while still allowing heat to be produced. This would lead to the situation described, where the blower does not maintain a consistent operation despite the heater's functioning.

In examining the other options, a worn faucet seat typically pertains to plumbing issues and would not influence the operations of a gas furnace. A blocked discharge vent can lead to serious safety hazards and may affect the overall heating efficiency, but if heat is still being produced, it suggests the furnace is still operational, which makes a faulty thermostat a more likely culprit for the blower's erratic behavior. Therefore, focusing on the thermostat is the best immediate course of action in this situation.

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Blocked discharge vent

All of the above

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