单项选择题

An inert gas system is designed to reduce the possibility of tank explosions by（）.

A.eliminating sparks and fire in the vicinity of cargo tanks
B.removing all hydrocarbon gases from the cargo tanks
C.blanketing cargo tanks with inert foam
D.reducing the oxygen concentration below levels necessary for combustion

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热门试题

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

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

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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