單項(xiàng)選擇題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


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1.單項(xiàng)選擇題Automatic mechanical ventilation shutdown is required for CO2 systems protecting the（）.

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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題Actuating the CO2 fixed system causes the shutdown of the（）.

A.fuel supply
B.exhaust ventilation
C.supply and exhaust ventilation
D.mechanical and natural ventilation