CFAA Fire Alarm Technician · Question
How is the sequence of operation for an Air Handling Unit (AHU) verified?
When verifying fan shutdown, the verifier must confirm that the relay at the fire alarm interface actually stops the fan or closes the damper as specified.
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Question: How is the sequence of operation for an Air Handling Unit (AHU) verified?
Answer options:
- Only testing the relay click at the panel.
- Checking the fan's motor temperature. ✅ Confirmation that the fan actually stops or the damper closes.
- Bypassing the relay and manually turning the fan off.
Correct answer: Confirmation that the fan actually stops or the damper closes.
Explanation: When verifying fan shutdown, the verifier must confirm that the relay at the fire alarm interface actually stops the fan or closes the damper as specified.
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Question explanations
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
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