單項(xiàng)選擇題

A pelican hook（）.

A.Can be released while under strain
B.Is used for boat falls
C.Is used for extra heavy loads
D.Is used for light loads only

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單項(xiàng)選擇題

A common class of wire rope is the 6X37 class.What does the 37 represent（）.

A.Number of wires in the inner core
B.Number of strands per wire rope
C.Tensile strength of the wire
D.Number of wires per strand

單項(xiàng)選擇題

A Chinese stopper（two lines）will hold best when you（）.

A.fasten the bitter ends to the mooring line with half hitches
B.twist the ends together and hold them in the direction of the pull
C.twist the ends together and hold them in the direction opposite to the pull
D.twist the ends together and hold them at right angles to the mooring line