單項選擇題

The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.

A.shield fire fighters from radiant heat
B.break up burning material
C.get the most water possible on the fire
D.drive heat and smoke ahead of the fire fighters

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單項選擇題

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

單項選擇題

The spread of fire is prevented by（）.

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