Water Supply and Fire Suppression Flashcards
6 cards from real F80 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Water Supply and Fire Suppression flashcards as text
A Class I standpipe system is designed for use by whom?
Answer: Trained fire department personnel only
Class I standpipe systems provide 2.5-inch hose connections intended exclusively for use by trained fire department personnel.
What is the minimum residual pressure generally required at the most remote fire hydrant during fire flow conditions per NFPA standards?
Answer: 20 psi
NFPA standards require a minimum residual pressure of 20 psi at the most remote hydrant while delivering the required fire flow.
Which suppression agent is most effective on Class B (flammable liquid) fires?
Answer: CO2 or dry chemical agent
CO2 and dry chemical agents extinguish Class B fires by excluding oxygen or interrupting the chemical chain reaction without spreading the burning liquid.
What happens when a deluge sprinkler system activates?
Answer: Water discharges simultaneously from all open sprinkler heads throughout the protected area
A deluge system has all heads open at all times; when activated by detection, water is released simultaneously from every head, flooding the entire protected zone.
What is the typical operating pressure range for a standard fire sprinkler head to achieve its design spray pattern?
Answer: 15–25 psi
Standard sprinkler heads are designed to operate at 15–25 psi to achieve the intended spray pattern and coverage density.
How does a wet pipe sprinkler system differ from a dry pipe system?
Answer: Wet pipe systems have water continuously pressurized in the piping for immediate discharge
In a wet pipe system, pressurized water fills the piping at all times, so water discharges immediately when a sprinkler head activates.