單項(xiàng)選擇題In moderate wind and current what should be the length of chain with a single anchor?（）

A.5 times the depth of the water in good holding ground
B.10 times the depth of the water in shallow water
C.2 times the depth of the water in poor holding ground
D.8 times the depth of the water in deep water


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1.單項(xiàng)選擇題If kinking results while wire rope is being coiled clockwise，you should（）.

A.coil it counterclockwise
B.not coil it
C.take a turn under
D.twist out the kinks under a strain

2.單項(xiàng)選擇題If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.

A.when the line pull reaches the rated winch capacity
B.after the line pull exceeds the rated winch capacity
C.after a short build-up of torque
D.immediately