單項(xiàng)選擇題You are handling a mooring line and are instructed to Check the line.What should you do（）.

A.Ensure the bight is not fouled by taking up slack
B.Pay out the line smartly and keep it free for running
C.Secure the line by adding more turns
D.Surge the line so it maintains a strain without parting


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1.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

2.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

3.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

4.單項(xiàng)選擇題Which mooring line prevents sideways motion of a vessel moored to a pier（）.

A.A line led forward from the bow
B.A line led aft from the bow
C.A line led in the same direction as the keel
D.A line led at a right angle to the keel

5.單項(xiàng)選擇題When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.

A.on only the forward falls
B.on only the after falls
C.with a lead of about 45 degrees to the boat
D.from the falls to the main deck of the vessel