单项选择题

A fixed CO₂ system on a ship with a capacity of over 300 lbs (136 kilograms) CO₂ which protects spaces other than tanks must have（）.

A.two or more releasing stations
B.automatic release in event of a fire
C.an audible alarm and time delay
D.an audible and visible alarm

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单项选择题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

单项选择题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

单项选择题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

单项选择题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

单项选择题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

A fixed CO2 system on a ship with a capacity of over 300 lbs (136 kilograms) CO2 which protects spaces other than tanks must have（）.

A fixed CO₂ system on a ship with a capacity of over 300 lbs (136 kilograms) CO₂ which protects spaces other than tanks must have（）.