单项选择题
An important step in fighting any electrical fire is to（）.
A.stop ventilation
B.stop the vessel
C.de-energize the circuit
D.apply water to extinguish the fire
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相关考题
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单项选择题
An extinguishing agent which effectively cools，dilutes combustible vapors，removes oxygen，and provides a heat and smoke screen is（）.
A.carbon dioxide
B.Halon 1301
C.dry chemical
D.water fog -
单项选择题
An engine compartment gasoline fire requires which type of extinguisher?（）.
A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above -
单项选择题
An effective method for moving patients with spinal injuries onto a spine board is known as the（）.
A.pack-strap carry
B.two man extremities carry
C.fireman's drag
D.four man log roll
