Fire Alarm Requirements of NFPA 72

This quiz is based on the requirements of NFPA 72, 2019 edition.

1. After silencing a trouble signal at the fire alarm control unit, when must the audible signal resound if the trouble has not been restored to normal.

Correct Answer: Once every 24 hours

2. In calculating the required secondary power for a nonvoice fire alarm system, total alarm current is 2 amps and standby (nonalarm) current is 0.5 amps. Considering a 20% safety factor, what minimum size batteries are required.

Correct Answer: 14.5 AH

3. Fire alarm equipment must be designed to operate properly within what voltage limitations?

Correct Answer: At 85% and 110 percent of nameplate voltages

4. For nonrestorable spot-type fixed-temperature detectors, after what time period from initial installation do all devices have to be either replaced or two detectors per 100 be laboratory-tested?

Correct Answer: 15 years

5. Where would you look in NFPA 72 to find a testing method for a duct smoke detector?

Correct Answer: Table

6. Regarding smoke-detector-sensitivity testing requirements: if tests indicate after the second required calibration test that the device has remained within its listed and marked sensitivity range (or 4% obscuration light gray smoke, if not marked), the length of time between calibration tests shall be permitted to be extended to ______.

Correct Answer: a maximum of 5 years

7. In spaces served by air-handling systems, which of the following applies?

Correct Answer: Detectors shall not be located where airflow prevents detector operation.

8. Wall-mounted visible notification appliances must be installed within the range of ______.

Correct Answer: 80–96 in. above finished floor

9. Which of the following is considered a method of minimizing nuisance alarms?

Correct Answer: Alarm verification

10. Which of the following is not an acceptable method for testing for smoke entry?

Correct Answer: A listed magnet tool acceptable to the manufacturer