CFAA Fire Alarm Technician · Question
When a fire alarm is activated, what happens to the building's smoke control fans during a verification test?
CAN/ULC-S537-19 Clause 5.14.3.1.1 states that upon alarm, smoke control systems must be verified to switch to their emergency mode (e.g., pressurization fans ON
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Question: When a fire alarm is activated, what happens to the building's smoke control fans during a verification test?
Answer options:
- They must immediately shut down to prevent smoke spread ✅ They must operate as per the designed smoke control sequence
- They must remain in their normal day-to-day operation mode
- They must be manually started by the Fire Department only
Correct answer: They must operate as per the designed smoke control sequence
Explanation: CAN/ULC-S537-19 Clause 5.14.3.1.1 states that upon alarm, smoke control systems must be verified to switch to their emergency mode (e.g., pressurization fans ON, exhaust fans ON).
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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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