单项选择题

The sprinkler system of a survival craft is used to（）.

A.cool the craft in a fire
B.cool the engine
C.spray oil on the sea to calm it
D.spray personnel during a fire

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单项选择题

A.cooling surfaces adjacent to the fire
B.leaving combustibles in the endangered area
C.increasing the oxygen supply
D.All of the above

单项选择题

The spread of fire is NOT prevented by（）.

A.shutting off the oxygen supply
B.cooling surfaces adjacent to the fire
C.removing combustibles from the endangered area
D.removing smoke and toxic gases by ensuring adequate ventilation

单项选择题

The remote control for a fixed fire extinguishing system should be（）.

A.painted red and labeled
B.concealed from the crew
C.protected by plexiglass
D.padlocked