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


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1.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

2.單項(xiàng)選擇題A CO2 extinguisher on a ship which has lost 10% of its charge must be().

A.used at the earliest opportunity
B.hydrotested
C.recharged
D.weighed again in one month

3.單項(xiàng)選擇題A branch line valve of a fire extinguishing system on a ship must be marked with the().

A.maximum pressure allowed at that branch
B.name of the space or spaces which it serves
C.date of the last maintenance inspection
D.pressure needed to maintain an effective stream at that point

4.單項(xiàng)選擇題(),as the chemical extinguisher agent,should be used for an electric fire.

A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical

5.單項(xiàng)選擇題The danger of a charged hose left unattended on deck with the nozzle open is().

A.the hose could burst
B.the nozzle end will whip about causing damage or injury
C.water damage to vessel's cargo or structure
D.personnel might trip over the hose

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