单项选择题
A.Start each fire pump B.Launch and run a lifeboat C.Inventory rescue and fire equipment D.Inspect fire hoses
Due to the hazards involved with Halon extinguishers on...
单项选择题Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.
A.outside B.on class C fires C.in an emergency D.on class B fires
Dry chemical fire extinguishers are effective on which ...
单项选择题Dry chemical fire extinguishers are effective on which type(s) of fire?（）
A.Burning oil B.Electrical C.Paint D.All of the above
Dry chemical extinguishers extinguish class B fires to ...
单项选择题Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
A.cooling B.smothering C.oxygen dilution D.breaking the chain reaction
