單項(xiàng)選擇題

Which will cause a wire rope to fail（）.

A.Using a medium graphite grease as a lubricant
B.Operating a winch too slow
C.Using a sheave with an undersized throat
D.A sheave diameter of 24 times the wire's diameter

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單項(xiàng)選擇題

Which type of link is generally used to connect shots of anchor chain（）.

A.Detachable
B.Open
C.Pear shaped
D.Stud link

單項(xiàng)選擇題

Which tackle arrangement has the LEAST mechanical advantage（）.

A.Single whip
B.Gun tackle
C.Luff tackle
D.Twofold purchase