單項(xiàng)選擇題In securing a towing cable，consideration must be given to letting go in an emergency. The possible whip of towlines when released can be overcome by（）.

A.increasing the shaft RPM prior to release
B.using a pelican hook for quick release
C.using preventers
D.using a short chain for the lead through the stern chock


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1.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

2.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

3.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

4.單項(xiàng)選擇題Herringbone is a term associated with（）.

A.anchoring
B.mooring
C.sewing
D.splicing

5.單項(xiàng)選擇題Galvanizing would be suitable for protecting wire rope which is used for（）.

A.cargo runners
B.stays
C.topping lifts
D.All of the above