S95 Fire Alarm System Operation 4

Question 1

A fire alarm system's secondary power supply (battery) must be capable of operating the system in standby mode for a minimum of how many hours, per NFPA 72?

Accepted Answer

24 hours

Answer

4 hours

Answer

12 hours

Answer

72 hours

Question 2

A duct smoke detector installed in an HVAC system is PRIMARILY intended to:

Accepted Answer

Detect smoke in the air stream and shut down the air handling unit to prevent smoke spread

Answer

Activate the building's general alarm and initiate full evacuation

Answer

Monitor CO levels within the ductwork system

Answer

Provide continuous air quality data to the building management system

Question 3

Under NFPA 72, which entity has final authority over the installation and operation of a fire alarm system?

Accepted Answer

The authority having jurisdiction (AHJ)

Answer

The building owner or property manager

Answer

The installing contractor's licensed engineer of record

Answer

The manufacturer of the fire alarm control unit

Question 4

A waterflow switch on a wet-pipe sprinkler system sends a signal to the fire alarm control unit when:

Accepted Answer

Water flows through the system due to sprinkler operation or pipe break

Answer

The water pressure in the system drops below a preset threshold

Answer

The system's control valve is moved to the closed position

Answer

Ambient temperature in the sprinkler zone drops below freezing

Question 5

When a fire alarm system is tested, notification appliances in occupied spaces must be:

Accepted Answer

Coordinated with occupants in advance and the AHJ notified before testing

Answer

Tested at full rated volume to verify compliance

Answer

Tested after midnight to minimize disruption

Answer

Disabled during testing and verified separately with a sound level meter

Question 6

What is the purpose of a 'zone' in a conventional fire alarm system?

Accepted Answer

To divide the building into areas so a responding team can quickly locate the alarm source

Answer

To group notification appliances for staged evacuation sequences

Answer

To separate addressable devices by floor for panel programming purposes

Answer

To restrict alarm signal transmission to the supervising station by area

Question 7

A fire alarm system supervisor discovers that a pull station in a stairwell has been mechanically blocked by a piece of tape placed over it. The FIRST action should be:

Accepted Answer

Remove the obstruction immediately and investigate how it occurred

Answer

Document the finding in the maintenance log for the next service visit

Answer

Notify the supervising station to place the zone on test mode

Answer

Replace the pull station as it may have been tampered with