FPE Fire Detection & Alarm Systems 2

Question 1

What is the primary purpose of a duct smoke detector installed in an HVAC air handling unit?

Accepted Answer

To detect smoke in the airstream and shut down the air handling unit

Answer

To activate the sprinkler system when smoke is detected

Answer

To alert occupants in the occupied space below the ductwork

Answer

To measure air temperature for fire modeling purposes

Question 2

Which of the following is classified as a notification appliance rather than an initiating device in a fire alarm system?

Accepted Answer

Strobe light alarm device

Answer

Duct smoke detector

Answer

Waterflow alarm switch

Answer

Manual pull station

Question 3

What is the primary operational advantage of an addressable fire alarm system over a conventional zoned system?

Accepted Answer

Ability to pinpoint the exact device that initiated an alarm

Answer

Lower installation material costs

Answer

Higher detector sensitivity across all device types

Answer

Elimination of the need for periodic testing

Question 4

What does alarm verification in a fire alarm control panel accomplish?

Accepted Answer

Delays retransmission by re-sampling the detector to reduce false alarms

Answer

Confirms that the fire department has acknowledged the alarm

Answer

Verifies that all notification appliances are operating at correct sound levels

Answer

Tests the integrity of battery backup power after an alarm event

Question 5

A Digital Alarm Communicator Transmitter (DACT) in a fire alarm system transmits signals over which infrastructure?

Accepted Answer

Public switched telephone network (PSTN)

Answer

Dedicated leased telephone lines

Answer

Radio frequency licensed spectrum

Answer

Fiber optic backbone cabling

Question 6

Under NFPA 72, a Positive Alarm Sequence (PAS) allows what specific action before a full alarm is transmitted?

Accepted Answer

An authorized person has up to 15 seconds to investigate and reset the detector

Answer

The building automation system automatically verifies the fire event

Answer

The sprinkler system activates before the audible alarm sounds

Answer

A second detector in the same zone must also activate before the alarm sounds

Question 7

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

Accepted Answer

Provides power and supervision to audible and visual alarm devices

Answer

Carries detection signals from initiating devices to the control panel

Answer

Connects the fire alarm panel to the central monitoring station

Answer

Monitors wiring integrity of smoke detector circuits