S95 Fire Alarm System Operation 5

Question 1

In a fire alarm system, the term 'alarm verification' refers to a feature that:

Accepted Answer

Introduces a time delay to re-sample detector input before transmitting an alarm signal

Answer

Requires a second manual pull station activation before sounding general alarm

Answer

Sends an automatic test signal to the supervising station every 24 hours

Answer

Requires two independent smoke detectors to activate before initiating evacuation

Question 2

Which type of occupancy is MOST likely to require a voice evacuation system rather than audible tone-only notification?

Accepted Answer

High-rise buildings above 75 feet in height

Answer

Single-family residential dwellings

Answer

Small retail stores under 5,000 square feet

Answer

Open parking structures with fewer than 500 spaces

Question 3

A photoelectric smoke detector operates on which principle?

Accepted Answer

Interruption or scattering of a light beam by smoke particles

Answer

Ionization of air molecules between two electrically charged plates

Answer

Detection of infrared radiation emitted by combustion gases

Answer

Measurement of heat energy released per unit area of the sensing chamber

Question 4

A supervisory signal from a sprinkler system pressure switch would MOST likely indicate:

Accepted Answer

Air or water pressure in the system has deviated from normal operating range

Answer

A sprinkler head has activated and water is flowing

Answer

The sprinkler system's main drain valve has been fully opened

Answer

Smoke has been detected in the sprinkler riser room

Question 5

When performing a fire alarm system inspection, the supervisor notices a smoke detector has a painted-over grille. The CORRECT action is to:

Accepted Answer

Tag the detector as failed and replace it, since paint compromises sensing chamber entry

Answer

Test the detector with canned smoke to verify it still functions through the paint

Answer

Document the finding and schedule repainting of the surrounding ceiling to match

Answer

Clean the detector grille with compressed air to restore airflow

Question 6

A fire alarm control unit displays a 'common alarm' condition. This means:

Accepted Answer

At least one initiating device in the system has activated an alarm condition

Answer

Multiple supervisory signals are active simultaneously throughout the building

Answer

The notification appliances are sounding on all zones including non-alarmed areas

Answer

The primary and secondary power supplies have both failed

Question 7

Under NFPA 72, how often must a fire alarm system's battery backup be load-tested to verify adequate capacity?

Accepted Answer

Annually under simulated load conditions

Answer

Monthly using the panel's built-in self-test

Answer

Every 3 years with a full discharge test

Answer

Every 5 years or when the battery reaches 80% of its rated life