S95 Notification Appliances 2 — Questions and Answers
Question 1: In a corridor, wall-mounted strobes must be spaced no more than how many feet apart per NFPA 72?
- 50 feet
- 75 feet
- 100 feet (Correct answer)
- 150 feet
Correct answer: 100 feet
NFPA 72 requires corridor strobes to be spaced no more than 100 feet apart measured along the corridor to ensure adequate visual coverage.
Question 2: The first strobe in a corridor must be placed within how many feet of each end of the corridor per NFPA 72?
- 10 feet
- 15 feet (Correct answer)
- 20 feet
- 25 feet
Correct answer: 15 feet
Per NFPA 72, the first strobe in a corridor must be located within 15 feet of each end to ensure occupants near corridor ends receive visual notification.
Question 3: What is 'public mode' notification in a fire alarm system?
- Notification transmitted directly to the local fire department
- Notification intended to alert all building occupants to take protective action (Correct answer)
- Notification sent only to designated security personnel
- Notification broadcast exclusively over a public address system
Correct answer: Notification intended to alert all building occupants to take protective action
Public mode notification is designed to alert all building occupants simultaneously so they can take appropriate protective action such as evacuation.
Question 4: What is 'private mode' notification in a fire alarm system?
- An encrypted signal sent only to the monitoring station
- Notification directed to responsible personnel rather than all occupants (Correct answer)
- A silent alarm with no audible or visual indication
- Notification that operates only during business hours
Correct answer: Notification directed to responsible personnel rather than all occupants
Private mode notification is directed to designated personnel (such as security or building staff) rather than all building occupants, allowing trained staff to respond first.
Question 5: Per NFPA 72, what is the maximum mounting height for a ceiling-mounted strobe?
- 10 feet
- 15 feet
- 20 feet
- 30 feet (Correct answer)
Correct answer: 30 feet
NFPA 72 permits ceiling-mounted strobes to be installed at a maximum height of 30 feet above the finished floor.
Question 6: Why does NFPA 72 require a low-frequency sounder at 520 Hz for sleeping area notification?
- To comply with building energy efficiency standards
- To penetrate walls more effectively in large buildings
- To awaken sleeping occupants more effectively, especially those with mild hearing loss (Correct answer)
- To reduce interference with electronic medical devices
Correct answer: To awaken sleeping occupants more effectively, especially those with mild hearing loss
Research has shown that low-frequency tones at 520 Hz are significantly more effective at awakening sleeping occupants, particularly those with mild to moderate hearing loss.
Question 7: A Notification Appliance Circuit (NAC) provides supervised power to which devices?
- Initiating devices such as smoke and heat detectors
- The FACP control panel itself
- Audible and visual notification appliances (Correct answer)
- Remote annunciator panels only
Correct answer: Audible and visual notification appliances
The Notification Appliance Circuit (NAC) provides supervised power distribution specifically to audible and visual notification devices throughout the protected premises.
S95 Notification Appliances 2
In a corridor, wall-mounted strobes must be spaced no more than how many feet apart per NFPA 72?