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單項(xiàng)選擇題

A fire starts on your vessel while refueling. You should FIRST（）.

A.stop the ventilation
B.sound the general alarm
C.determine the source of the fire
D.attempt to extinguish the fire

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單項(xiàng)選擇題

A combination or all-purpose nozzle produces（）.

A.low-velocity fog only
B.a solid stream only
C.a solid stream and foam
D.a solid stream and fog

單項(xiàng)選擇題

A CO₂ portable extinguisher is annually checked by（）.

A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO₂
D.seeing if the seal has been broken

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