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單項選擇題

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

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單項選擇題

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

單項選擇題

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

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