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單項(xiàng)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

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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

單項(xiàng)選擇題

On a long ocean tow，the bridle should be made up of two equal lengths of（）.

A.chain
B.wire
C.nylon
D.manila