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單項選擇題

opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.

A.Preventers
B.Side ropes
C.Stays
D.Guide lines

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單項選擇題

On your vessel，a wire rope for the cargo gear shows signs of excessive wear and must be replaced. In ordering a new wire for this 10-ton boom，what safety factor should you use?（）

A.Three
B.Five
C.Six
D.Seven

單項選擇題

On an anchor windlass，the wheel over which the anchor chain passes is called a（）.

A.brake compressor wheel
B.devil's claw
C.wildcat
D.winchhead

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