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
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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
A.a continuous ringing for 10 seconds
B.one short ring followed by one long ring
C.two long rings of at least 20 seconds
D.a continuous ringing until the fire is extinguished
最新試題
Cargo transfer operations on a tanker need NOT be stopped when（）.
Each fireman’s outfit and its spare equipment on a vessel must be stowed（）.
A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.
If，during helicopter refueling operations，fuel is spilled on clothing，the person should first（）.
Dry chemical fire extinguishers are effective on which type(s) of fire?（）
Control of fire on a ship should be addressed（）.
Automatic fire dampers in ventilation systems are operated by use of（）.
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.
Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.
Each fire hydrant must have at least one spanner and at least one（）.