F80 F80 Fire Safety Systems 2 — Questions and Answers
Question 1: What is the maximum allowable distance between sprinkler heads in a standard light hazard occupancy per NFPA 13?
- 10 feet
- 15 feet (Correct answer)
- 20 feet
- 25 feet
Correct answer: 15 feet
NFPA 13 allows a maximum of 15 feet between sprinkler heads in light hazard occupancies.
Question 2: Which type of fire detection system continuously monitors the rate of temperature rise in a protected area?
- Ionization detector
- Fixed-temperature heat detector
- Rate-of-rise heat detector (Correct answer)
- Photoelectric detector
Correct answer: Rate-of-rise heat detector
Rate-of-rise heat detectors activate when temperature increases faster than a set rate, typically 12–15°F per minute.
Question 3: Under NFPA 72, what is the minimum audible alarm level required in sleeping areas?
- 55 dB
- 65 dB
- 75 dB (Correct answer)
- 85 dB
Correct answer: 75 dB
NFPA 72 requires a minimum of 75 dB at the pillow level in sleeping areas to ensure occupants are awakened.
Question 4: A dry-pipe sprinkler system is most appropriate for which environment?
- High-temperature industrial areas
- Areas subject to freezing temperatures (Correct answer)
- Clean rooms with humidity control
- High-rise buildings above 75 feet
Correct answer: Areas subject to freezing temperatures
Dry-pipe systems use pressurized air or nitrogen instead of water, preventing freezing in cold environments.
Question 5: What is the primary function of a fire damper in an HVAC system?
- Increase airflow during a fire
- Prevent smoke from entering ducts
- Close automatically to stop fire spread through ductwork (Correct answer)
- Activate the fire alarm system
Correct answer: Close automatically to stop fire spread through ductwork
Fire dampers close automatically when a fusible link melts, preventing fire from traveling through HVAC ductwork.
Question 6: Which class of standpipe system requires that hose and nozzle equipment be provided and maintained by the building owner?
- Class I
- Class II (Correct answer)
- Class III
- Class IV
Correct answer: Class II
Class II standpipe systems are intended for use by building occupants and must include hose, rack, and nozzle.
Question 7: When testing a fire pump, the pump must deliver 150% of its rated capacity at what minimum percentage of rated pressure?
- 55%
- 65% (Correct answer)
- 75%
- 85%
Correct answer: 65%
Per NFPA 20, a fire pump must deliver 150% of rated flow at no less than 65% of rated pressure.
F80 F80 Fire Safety Systems 2
What is the maximum allowable distance between sprinkler heads in a standard light hazard occupancy per NFPA 13?