Chapter #15 Fire Hose Flashcards
Standard on Fire Hose
NFPA 1961
A fire hoses measured diameter refers to what measurement?
The internal diameter.
What is the traditional length of fire hose in North America?
50’
Used to connect the pumper to a hydrant or other water source.
Suction hose (intake hose).
Standard on Automotive Fire Apparatus.
NFPA 1901
Large diameter hose, minimum of 15’ long, used to connect a pumper to a pressurized source (hydrant). Sizes range from 2 1/2” to 6”. Has two female or non threaded couplings.
Soft Sleeve Hose
Non collapsible hose that operates under a vacuum. Used to draft water from a static water source. Generally comes in 10’ sections. Sizes 2 1/2” to 6”. Two female or non threaded couplings.
Hard suction hose
Standard for Fire Hose Connections.
NFPA 1963
NFPA 1963 requires that all brands of fire hose coupling threads have what?
Compatabilty
What is the required thread type of fire hose called?
American National Fire Hose Connection Screw Threads. (National Hose)
What three types of alloys are used to make couplings?
Brass. Aluminum. Magnesium
Name three ways that couplings are manufactured.
Cast. Extruded. Drop Forged
Very weak. Only found on occupant type hose.
Cast
Lightweight and high strength. Usually made of aluminum. Stronger then cast couplings.
Extruded
Made of brass or other malleable metals. Strongest and most expensive couplings.
Drop Forged
A male coupling attached to a female coupling is called what?
A set (three piece coupling)
Name three types of coupling lugs.
Pin, Recessed, Rocker
Lug found on older fire hose. Not used anymore due to catching.
Pin
Lug found on booster hose. Enables hose to be wound up into a reel. Pin-lug spanner used to break connection.
Recessed
Modern fire hose lug. Prevents hose from catching on objects.
Rounded Rocker
Located on swivels of large intake supply or suction hose.
Handles or extended lugs.
Connected with locks or cams and not screw threads. Some have male and female ends, most are sexless.
Non threaded coupling
Name two types of sexless couplings.
Quarter turn. Stortz (turn 1/3)
T or F Can dirt become lodged into a sexless couplings grooves, giving the impression that it is a tight seal when it may not be?
True