FLSD Fire Alarm Systems 4 — Questions and Answers
Question 1: Under NFPA 72, what is the maximum allowable distance between smoke detectors in a corridor that is 10 feet wide?
- 15 feet
- 30 feet (Correct answer)
- 50 feet
- 75 feet
Correct answer: 30 feet
NFPA 72 requires smoke detectors in corridors to be spaced no more than 30 feet apart when the corridor is 10 feet wide or less.
Question 2: A fire alarm control panel (FACP) displays a 'trouble' signal. What is the FIRST action an FLSD should take?
- Evacuate the building immediately
- Silence the trouble signal and ignore it
- Investigate the source of the trouble condition (Correct answer)
- Call the fire department before investigating
Correct answer: Investigate the source of the trouble condition
A trouble signal indicates a fault in the system that requires investigation to identify and correct the problem before it compromises system reliability.
Question 3: Which type of fire alarm initiating device is MOST appropriate for detecting slow, smoldering fires in an office environment?
- Rate-of-rise heat detector
- Fixed-temperature heat detector
- Photoelectric smoke detector (Correct answer)
- Ionization smoke detector
Correct answer: Photoelectric smoke detector
Photoelectric smoke detectors respond more effectively to the large smoke particles produced by slow, smoldering fires than ionization detectors.
Question 4: What does a 'supervisory' signal on a fire alarm panel indicate?
- A fire has been detected
- A system component has failed completely
- An off-normal condition exists in a supervised system (Correct answer)
- The panel battery is fully charged
Correct answer: An off-normal condition exists in a supervised system
A supervisory signal indicates that a protected system (such as a sprinkler valve) is in an off-normal condition that requires attention but is not yet an alarm.
Question 5: In a high-rise building, voice evacuation systems are required to provide instructions to occupants. Which area must receive intelligible voice messages FIRST during a fire alarm?
- The entire building simultaneously
- Only the roof and penthouse floors
- The fire floor and the floors immediately above and below (Correct answer)
- The lobby and ground floor only
Correct answer: The fire floor and the floors immediately above and below
NFPA 72 and NYC high-rise codes require that voice evacuation messages be directed first to the fire floor and the floors immediately above and below to prioritize those in greatest danger.
Question 6: A manual pull station is activated but the fire alarm panel shows no alarm. What is the MOST likely cause?
- The pull station is a single-action type
- The initiating device circuit is open or the pull station is defective (Correct answer)
- The alarm threshold has not been reached
- The panel is in walk-test mode
Correct answer: The initiating device circuit is open or the pull station is defective
If a pull station activation does not register on the panel, an open circuit fault or a defective pull station is the most likely cause.
Question 7: Which NFPA standard governs the installation, testing, and maintenance of fire alarm and signaling systems in the United States?
- NFPA 13
- NFPA 25
- NFPA 72 (Correct answer)
- NFPA 101
Correct answer: NFPA 72
NFPA 72, the National Fire Alarm and Signaling Code, is the primary standard governing fire alarm system installation, testing, and maintenance.
FLSD Fire Alarm Systems 4
Under NFPA 72, what is the maximum allowable distance between smoke detectors in a corridor that is 10 feet wide?