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24 Cards in this Set
- Front
- Back
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Halon 1301
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Bromotrifluoromethane
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Halon 1211 is applied only with what?
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portable extinguishers or large units with a hose line
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What is Halon 1301 superpressurized with?
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nitrogen
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Halon is stored as what
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a liquid in gas cylinders
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Halon 1211
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Bromochlorodifluoromethane
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Halon 1211 characteristics
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colorless with a sweet smell
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Halon 1211 is pressurized with what
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nitrogen
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How does halon extinguish fire
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chemically inhibits the chain
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What class fire is Halon used for
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bravo fires
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How is Halon 1211 used
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it is not used in total flooding systems, Its lower volatility plus a high liquid density permits the agent to be sprayed as a liquid. used in 20 pound portable fire extinguishers on lcacs or on flightdecks with mobile firefighting apparatuses
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When does halon decompose
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upon contact with flames or hot surfaces above 900 F .
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When halon decomposes, what is produced
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hydrogen fluoride and hydrogen bromide
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what is the discharge time for halon
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its short, 10 seconds maximum.
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How does steam put out a fire
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it smothers it, as long as the steam blanket is maintained, it will prevent reignition.
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Where are steam smothering systems installed
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in boiler casings and catapult troughs.
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what size is the discharge piping on Halon
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1 1/2 inches
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what size is the tubing assembly on halon
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1/4in
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what is the bend radius of the tubing assembly on halon
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1 1/4 inch
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What size is the check valve in halon system and what is it used for
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1/4 inch and is used to isolate actuation stations, time delays, pressure switches.
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what are the 4 things pressure actuated switches initiating
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halon actuation alarms, ventilation system shutdowns, vent closure operation, and halon discharge alarms.
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how do you manually over ride the time delay
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quarter turn of the ball valve in the time delay bypass valve
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On the halon cylinder bottles, how big is the check valve and what is it used for
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its 1 1/2 in and its used so halon doesn't backflow into empty bottles
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what are the 3 types of magazine sprinkling systems
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automatic dry type, automatic wet, and manually operated dry.
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what is the difference in wet and dry type sprinkler systems
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dry type are installed with open sprinklers, and wet type systems have been installed with closed sprinklers
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