CO2 cylinders，which protect the small space in which th……

单项选择题CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.

A.the discharge valve is open
B.the control box glass is broken
C.pressure from the control cylinders is detected
D.the control cylinders have been completely discharged

单项选择题Automatic mechanical ventilation shutdown is required for CO2 systems protecting the（）.

A.machinery spaces
B.cargo compartments
C.living quarters
D.galley

单项选择题An inflatable liferaft should be lifted back aboard the ship by using（）.

A.the single hook at the top of the raft
B.two lines passed under the raft
C.the towing bridle
D.All of the above

单项选择题After using a CO2 extinguisher on a ship，it should be（）.

A.put back in service if some CO₂ remains
B.hydrostatically tested
C.retagged
D.recharged

单项选择题After each reading of an oxygen indicator，the instrument should be purged with（）.

A.CO₂
B.fresh air
C.the tested compartment's air
D.water