A.vapor to oxygen
B.the flammable limit concentration
C.the autoignition concentration
D.the lower explosive limit concentration
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A.fuel oil
B.wood
C.celluloid
D.electrical insulation
A.preventing oxygen from reaching the burning material
B.cooling the burning material below its ignition temperature
C.using the extinguishing agent to make the burning material fire-resistant
D.using the extinguishing agent to absorb the heat
A.the mimimum fire extinguishing equipment，lifejackets，survival and rescue craft she must carry
B.the name of the managing operator
C.any special conditions or restrictions on her operation
D.All the above
A.pressure release
B.backfire flame arrestor
C.automatic shut off
D.flow valve
A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
最新試題
A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.
Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.
Control of fire on a ship should be addressed（）.
Before using a fixed CO2 system to fight an engine room fire，you must（）.
Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.
If，during helicopter refueling operations，fuel is spilled on clothing，the person should first（）.
Each part of the fire-main system located on an exposed deck must be（）.
Each fireman’s outfit and its spare equipment on a vessel must be stowed（）.
A fire pump may be used for other purposes if（）.