單項選擇題

You are operating a lift boat.When beginning to jack down you should（）.

A.Jack down one leg at a time
B.Jack up first，then down
C.Undog doors to the engine room
D.Assemble all personnel on the main deck

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單項選擇題

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

單項選擇題

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