A.give flexibility
B.support the strands laid around it
C.allow some circulation around the strands
D.allow lubrication inside the rope
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A.Gun tackle
B.Luff tackle
C.Two-fold tackle
D.Double-luff tackle
A.cotton
B.lumber
C.steel
D.tires
A.should be coiled in a clockwise direction
B.should be coiled in a counterclockwise direction
C.may be coiled either clockwise or counterclockwise
D.should never be coiled
A.the engineers，from a panel in the engine room
B.shutting off the current to the winch
C.pushing the switch lever arm while the winch is running
D.All of the above
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
最新試題
The strongest method of forming an eye in wire rope is using（）.
Manila slings should not be used to load（）.
Limit switches on gravity davits should be tested by（）.
Cribbing is（）.
A whipping on a fiber line（）.
Back-up wires on a towed vessel provide（）.
Manila lines in which the strands are right-hand laid（）.
Anchor shackles should have a breaking strength that is（）.
Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.
The main function of the core of a wire rope is to（）.