Protection Systems Flashcards
7 cards from real Firefighter practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Protection Systems flashcards as text
An OS&Y (outside screw and yoke) valve is used to do what in a sprinkler system?
Answer: Control the main water supply and show open/closed status
An OS&Y valve controls water supply and shows whether it is open or closed by the position of the visible stem.
On an OS&Y valve, the system is OPEN when the threaded stem is in what position?
Answer: Extended outward (out)
When the stem protrudes out of the yoke, the valve is open; when retracted, it is closed.
A Fire Department Connection (FDC) allows firefighters to do what?
Answer: Boost water pressure to a sprinkler or standpipe system
The FDC lets pumpers supplement the system's water supply and pressure during a fire.
What is the primary purpose of a fire pump in a protection system?
Answer: To increase water pressure when municipal supply is inadequate
Fire pumps boost pressure for sprinklers and standpipes when the public supply cannot meet demand.
A Class I standpipe system is intended primarily for use by whom?
Answer: Trained firefighters with 2½-inch connections
Class I standpipes provide 2½-inch outlets for use by fire department personnel.
A Class II standpipe system provides what for occupant use?
Answer: 1½-inch hose and rack for occupants
Class II systems supply 1½-inch hose for occupants to fight incipient fires.
A Post Indicator Valve (PIV) is typically located where?
Answer: Outside the building on the underground supply main
A PIV is an above-ground post controlling the buried supply main, with a window showing OPEN or SHUT.