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單項(xiàng)選擇題

According to the regulations for lifeboat falls，which action must be taken with the falls no later than 5-year intervals?（）

A.Proof tested
B.End-for-ended
C.Renewed
D.Weight tested

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單項(xiàng)選擇題

According to the regulations for life boat falls，which action must be taken at 30-month intervals?（）

A.End-for-ended
B.Renewed
C.Inspected
D.Weight tested

單項(xiàng)選擇題

A sheave is a（）.

A.grooved wheel in a block
B.line to hold a lifeboat next to the embarkation deck
C.partial load of grain
D.seaman's knife

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