单项选择题
On a ship，when may a work vest be substituted for a required life preserver?（）
A.To replace a damaged life preserver
B.For use during fire drills
C.For use during boat drills
D.At no time
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相关考题
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单项选择题
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 -
单项选择题
On a ship，a fire drill shall be conducted once every（）.
A.week
B.month
C.crew change
D.other week -
单项选择题
Lifesaving regulations require that a fire drill include（）.
A.starting the fire pumps
B.checking the operation of watertight doors
C.checking arrangements for abandon ship
D.All of the above
