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單項(xiàng)選擇題

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

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單項(xiàng)選擇題

An engine compartment gasoline fire requires which type of extinguisher?（）.

A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above

單項(xiàng)選擇題

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