Fire Alarm Power Supplies
How well do you know NFPA 72 requirements for fire alarm power supplies? Take this quiz and test your knowledge.
1. All new fire alarm systems are required to use batteries for all or part of secondary power.
Correct Answer: True
2. Engine-driven generators used to provide secondary power for a protected premises fire alarm system or an emergency communications system shall comply with NFPA 110 Chapter 4, requirements for a Type ______ system.
Correct Answer: 10, Class 24, Level 1
3. A Type 10 system requires the system to ______.
Correct Answer: Transfer to secondary power within 10 seconds
4. A Class 24 system requires the system to ______.
Correct Answer: Provide secondary power for 24 hours
5. Installation of engine-driven generators used to provide secondary power for a protected premises fire alarm system or an emergency communications system shall be in accordance with NFPA 70, Article ______.
Correct Answer: 700
6. Where survivability of circuits is required by another section of the code, equal protection shall be provided for power supply circuits.
Correct Answer: True
7. The ______% safety margin is intended to address normal aging effects on battery capacity.
Correct Answer: 20
8. ______ batteries are fully charged and connected across the output of the rectifiers to smooth the output and to serve as a standby source of power in the event of a loss of line power.
Correct Answer: Float-charged
9. Battery-charging equipment shall be provided to recharge batteries within ______ hours after fully charged batteries have been subject to a single discharge cycle.
Correct Answer: 48
10. Where a circuit breaker is the disconnecting means, an approved breaker locking device shall be installed.
Correct Answer: True
Score: