單項選擇題

On a ship，watertight doors should be operated（）.

A.during abandon drill
B.during fire drill
C.weekly
D.when the rig is being moved

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單項選擇題

On a ship，how many ring buoys are required to have a buoyant line attached?（）

A.One ring life buoy
B.One ring life buoy on each side of the ship
C.Three ring life buoys
D.Two ring life buoys on each side of the ship

單項選擇題

On a ship，firefighting equipment must be inspected once every（）.

A.three months
B.six months
C.twelve months
D.eighteen months