CFAA Fire Alarm Technician · Question
At what minimum air-handling capacity must an HVAC system be equipped with an automatic smoke detection system for fan shutdown?
NBCC 3.2.4.12 requires that any HVAC system serving more than one floor or having a capacity over 944 L/s must shut down upon alarm to prevent smoke spread.
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Question: At what minimum air-handling capacity must an HVAC system be equipped with an automatic smoke detection system for fan shutdown?
Answer options:
- 94.4 L/s ✅ 944 L/s
- 1500 L/s
- 500 L/s
Correct answer: 944 L/s
Explanation: NBCC 3.2.4.12 requires that any HVAC system serving more than one floor or having a capacity over 944 L/s must shut down upon alarm to prevent smoke spread.
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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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