S95 Fire Alarm System Components 3

Question 1

Per NFPA 72, what is the minimum sound pressure level required for audible notification appliances in sleeping areas?

Accepted Answer

75 dB at the pillow

Answer

55 dB at the pillow

Answer

65 dB at the pillow

Answer

85 dB at the pillow

Question 2

Visible notification appliances (strobes) are required in locations where:

Accepted Answer

Ambient noise levels may prevent audible signals from being heard

Answer

All corridors regardless of length are present

Answer

Only outdoor environments are involved

Answer

Only fully sprinklered buildings are involved

Question 3

The candela (cd) rating of a strobe used in a fire alarm system refers to its:

Accepted Answer

Light intensity measurement

Answer

Sound output level

Answer

Operating voltage range

Answer

Maximum flash frequency

Question 4

Per NFPA 72, at what flash rate must visible notification appliances (strobes) operate?

Accepted Answer

1 to 2 flashes per second

Answer

0.5 to 1 flash per second

Answer

2 to 4 flashes per second

Answer

4 to 6 flashes per second

Question 5

Which circuit type connects notification appliances to the fire alarm control panel?

Accepted Answer

Notification Appliance Circuit (NAC)

Answer

Signaling Line Circuit (SLC)

Answer

Initiating Device Circuit (IDC)

Answer

Power-Limited Fire Alarm Circuit (PLFA)

Question 6

Speaker notification appliances used for emergency voice/alarm communication systems must be:

Accepted Answer

Listed for fire protective signaling use

Answer

Standard commercial audio speakers rated at 70V

Answer

Installed exclusively in exit stairwells

Answer

Connected directly to the building's main electrical panel

Question 7

A horn/strobe combination device used in a fire alarm system:

Accepted Answer

Provides both audible and visible alarm notification from a single unit

Answer

Can only be used in commercial occupancies under 10,000 sq ft

Answer

Is required to have a dedicated separate power supply circuit

Answer

Cannot be used in addressable fire alarm systems