CFAA Fire Alarm Technician · Question
In a high-rise building, what is the required fire-resistance rating (survivability) for circuits providing communication between the main control unit and emergency voice speakers?
NBCC 3.2.7.10 requires that distribution for emergency voice communication systems in high-rise buildings (under 3.2.6) remain operational for 2 hours in fire c
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Question: In a high-rise building, what is the required fire-resistance rating (survivability) for circuits providing communication between the main control unit and emergency voice speakers?
Answer options:
- 30 minutes
- 60 minutes
- 90 minutes ✅ 120 minutes
Correct answer: 120 minutes
Explanation: NBCC 3.2.7.10 requires that distribution for emergency voice communication systems in high-rise buildings (under 3.2.6) remain operational for 2 hours in fire conditions.
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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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