CPD Fire Protection & Suppression Systems Flashcards
6 cards from real CPD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPD Fire Protection & Suppression Systems flashcards as text
Which NFPA standard governs the installation of water-based fire suppression sprinkler systems in the US?
Answer: NFPA 13
NFPA 13, Standard for the Installation of Sprinkler Systems, is the primary US standard governing the design and installation of water-based automatic fire sprinkler systems.
What is the purpose of a fire department connection (FDC) on a sprinkler system?
Answer: To allow fire department pumper trucks to supplement system water supply during a fire
The FDC allows fire department pumper trucks to inject additional water pressure and volume into the sprinkler system when building water supply is insufficient during a fire.
What is the difference between a wet-pipe and a dry-pipe sprinkler system?
Answer: Wet-pipe systems contain water in the piping at all times; dry-pipe systems use pressurized air with water only released upon sprinkler activation
Wet-pipe systems keep piping continuously charged with water for immediate discharge, while dry-pipe systems use pressurized air that exhausts first to allow water into the pipes only after a sprinkler opens.
In NFPA 13 sprinkler design, what does 'hazard classification' determine?
Answer: The required water density and area of application used to size the sprinkler system
Hazard classification (light, ordinary, extra) determines the design water density in gallons per minute per square foot and the design area used to calculate sprinkler system demand.
What is a backflow preventer's role in a fire protection system connected to a potable water supply?
Answer: To prevent contaminated fire suppression water from flowing back into the potable water supply
A backflow preventer on the fire protection supply connection ensures that water in sprinkler piping, which may contain corrosion inhibitors or other contaminants, cannot back-siphon into the potable water system.
What is the minimum residual pressure typically required at the most remote sprinkler head per NFPA 13?
Answer: 7 psi
NFPA 13 requires a minimum residual pressure of 7 psi at the most hydraulically remote sprinkler head to ensure adequate water distribution during a fire event.