Secondary Power Requirements
Test your knowledge of NFPA 72 2016 secondary power requirements.
1. Sealed lead-acid batteries must be replaced ________.
Correct Answer: When either C or D apply
2. The battery calculation safety margin for batteries used for fire alarm secondary power ________ percent.
Correct Answer: 20
3. A generator used for providing secondary power for a fire alarm system must meet the requirements of NFPA 110 for a Type 10, Class 24, Level 1 system. Type 10 requires ________.
Correct Answer: 10 minutes transfer (to standby) time
4. Secondary power capacity for shared equipment shall be permitted to have a capacity of ________ hours where acceptable to the authority having jurisdiction and where a risk analysis is performed to ensure acceptable availability is provided.
Correct Answer: 8
5. While operating on secondary power, audio amplifier monitoring shall be required only when an alarm is present.
Correct Answer: True
6. The secondary power supply for in-building mass notification systems shall be capable of operating the system under quiescent load for a minimum of 24 hours and then shall be capable of operating the system during emergency conditions for a period of ________ minutes at maximum connected load.
Correct Answer: 15
7. All fire alarm systems require batteries as part or all of its secondary power.
Correct Answer: True
8. Fire alarm systems for supervising stations require batteries as part or all of the secondary power.
Correct Answer: False
9. Batteries are ________ if they are offline and waiting to be put under load in the event of a loss of power.
Correct Answer: Trickle-charged
10. When performing charger tests for sealed lead-acid batteries, with the batteries fully charged and connected to the charger, measure the voltage across the batteries with a voltmeter. Verify the voltage is ________ volts per cell, ±0.02 volts at 77°F (25°C) or as specified by the manufacturer.
Correct Answer: 2.30
Score: