NFPA NFPA 72 Fire Alarm Systems 2 — Questions and Answers
Question 1: Under NFPA 72, what is the maximum height above the floor at which a manual pull station may be installed?
- 48 inches
- 54 inches
- 60 inches (Correct answer)
- 66 inches
Correct answer: 60 inches
NFPA 72 requires manual pull stations to be mounted between 42 and 60 inches above the finished floor.
Question 2: According to NFPA 72, how frequently must a fire alarm system receiving central station monitoring be tested?
- Monthly
- Quarterly
- Semi-annually
- Annually (Correct answer)
Correct answer: Annually
NFPA 72 requires that most fire alarm system components be tested at least annually unless more frequent testing is specified.
Question 3: Under NFPA 72, a notification appliance circuit (NAC) must be supervised for which of the following conditions?
- Low battery only
- Open circuit and ground fault (Correct answer)
- Overload and short circuit
- Loss of AC power only
Correct answer: Open circuit and ground fault
NFPA 72 requires that notification appliance circuits be monitored for integrity, meaning open circuits and ground faults must be detected.
Question 4: What does NFPA 72 specify as the maximum travel distance to a manual pull station in an educational occupancy?
- 100 feet
- 150 feet (Correct answer)
- 200 feet
- 300 feet
Correct answer: 150 feet
NFPA 72 requires manual pull stations to be located so that travel distance from any point in the protected area does not exceed 200 feet.
Question 5: Under NFPA 72, which type of detector is best suited for detecting slow, smoldering fires with little visible smoke?
- Rate-of-rise heat detector
- Fixed-temperature heat detector
- Ionization smoke detector
- Photoelectric smoke detector (Correct answer)
Correct answer: Photoelectric smoke detector
Photoelectric smoke detectors are most effective at detecting slow, smoldering fires that produce large combustion particles.
Question 6: According to NFPA 72, what signal must a fire alarm control unit transmit when a detector or device is removed for maintenance?
- Alarm signal
- Supervisory signal
- Trouble signal (Correct answer)
- No signal required
Correct answer: Trouble signal
NFPA 72 requires that removal of a detector or initiating device from its base generate a trouble signal at the control unit.
NFPA NFPA 72 Fire Alarm Systems 2
Under NFPA 72, what is the maximum height above the floor at which a manual pull station may be installed?