CFM CFM Fire Suppression Systems & Equipment 1 — Questions and Answers
Question 1: Which type of automatic sprinkler system keeps pipes filled with pressurized water at all times and is the most common system installed in buildings?
- Dry pipe system
- Wet pipe system (Correct answer)
- Pre-action system
- Deluge system
Correct answer: Wet pipe system
Wet pipe systems maintain pressurized water in the pipes continuously, allowing immediate discharge when a sprinkler head activates.
Question 2: A dry pipe sprinkler system is most appropriate in which of the following environments?
- Heated office buildings
- Unheated warehouses or freezer areas where pipes could freeze (Correct answer)
- High-rise residential buildings
- Underground parking garages with stable temperatures
Correct answer: Unheated warehouses or freezer areas where pipes could freeze
Dry pipe systems use pressurized air or nitrogen instead of water in the pipes, making them suitable for spaces subject to freezing temperatures.
Question 3: What is the primary purpose of a fire department connection (FDC) on a suppression system?
- To drain the system after a fire
- To allow firefighters to supplement system water supply from a pumper truck (Correct answer)
- To test the system pressure remotely
- To connect the alarm panel to the water supply
Correct answer: To allow firefighters to supplement system water supply from a pumper truck
The FDC allows fire department pumpers to boost water pressure and supply into the sprinkler or standpipe system during firefighting operations.
Question 4: Under NFPA 13, what is the minimum distance a standard sprinkler head must be located from a wall?
- 2 inches
- 4 inches (Correct answer)
- 6 inches
- 12 inches
Correct answer: 4 inches
NFPA 13 requires sprinkler heads to be positioned at least 4 inches from walls to ensure proper water distribution coverage.
Question 5: Which fire suppression agent is most appropriate for a Class K kitchen fire involving cooking oils and fats?
- Dry chemical (ABC)
- Carbon dioxide (CO2)
- Wet chemical agent (Correct answer)
- Halon 1301
Correct answer: Wet chemical agent
Wet chemical agents are specifically designed for Class K fires because they saponify cooking oils, forming a soapy foam that cools and smothers the fire.
Question 6: A pre-action sprinkler system requires which condition before water is released into the piping?
- Manual activation by a fire marshal only
- Detection of a fire event by a separate detection system (Correct answer)
- Activation of all sprinkler heads simultaneously
- Confirmation from two separate water supply valves
Correct answer: Detection of a fire event by a separate detection system
Pre-action systems require a separate fire detection event to open the pre-action valve before water enters the pipes, providing extra protection against accidental discharge.
CFM CFM Fire Suppression Systems & Equipment 1
Which type of automatic sprinkler system keeps pipes filled with pressurized water at all times and is the most common system installed in buildings?