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
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相关考题
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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 -
单项选择题
An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?（）
A.Fire a red flare at night or a red smoke signal by day
B.Send the Morse signal N by flashing light
C.Make a round turn (360°) and resume course
D.Make an S turn (hard right then hard left) and resume course
