CFI Fire Alarm & Detection Systems 3

Question 1

Which type of detector would be MOST appropriate in a commercial kitchen where cooking fumes could cause nuisance alarms?

Accepted Answer

Fixed-temperature heat detector

Answer

Fixed-temperature heat detectors are preferred in commercial kitchens because they are not affected by cooking vapors, steam, or aerosols that trigger smoke detectors.

Question 2

What is the required audible alarm sound level at the pillow in sleeping areas per NFPA 72?

Accepted Answer

75 dB(A)

Answer

NFPA 72 requires a minimum of 75 dB(A) at the pillow to ensure sleeping occupants can be awakened by the alarm signal.

Question 3

A fire alarm control unit (FACU) displays a 'ground fault' trouble condition. What does this indicate?

Accepted Answer

An unwanted electrical connection exists between a circuit conductor and earth ground

Answer

A ground fault occurs when a wire insulation failure or moisture causes an unintended connection between a circuit conductor and the building ground.

Question 4

When inspecting a fire alarm system, an inspector discovers that the system has not been tested in 18 months. Per NFPA 72, what is the minimum required testing frequency for most components?

Accepted Answer

Annually

Answer

NFPA 72 Chapter 14 requires that most fire alarm system components be tested at a minimum frequency of annually.

Question 5

What is the function of a 'notification appliance circuit' (NAC) in a fire alarm system?

Accepted Answer

Connect the control panel to audible or visual alerting devices such as horns and strobes

Answer

The NAC is the wiring circuit that carries the signal from the fire alarm control unit to the horns, bells, strobes, and other notification appliances.

(CFI) Certified Fire Inspector Practice Test

(CFI) Certified Fire Inspector Practice Test

CFI Fire Alarm & Detection Systems 3