單項(xiàng)選擇題Anchor shackles should have a breaking strength that is（）.

A.equal to the chains they are connecting
B.25% more than the chains they are connecting
C.50% more than the chains they are connecting
D.100% more than the chains they are connecting


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1.單項(xiàng)選擇題An anchor winch should be equipped with mechanical brakes capable of holding（）.

A.half the breaking strength of the mooring line
B.the full breaking strength of the mooring line
C.the maximum expected tension of the mooring line
D.50% over the working tension of the mooring line

2.單項(xiàng)選擇題After deploying the anchor，a permanent chain chaser is（）.

A.removed from the anchor chain
B.connected to a buoy at the anchor
C.stripped back to the rig and secured
D.connected to a buoy halfway down the chain

3.單項(xiàng)選擇題A whipping on a fiber line（）.

A.keeps the ends from fraying
B.strengthens it
C.protects your hands
D.becomes part of a splice

4.單項(xiàng)選擇題A whipping is（）.

A.a messenger
B.a stopper for nylon line
C.a U-bolt for securing a cargo whip to the winch drum
D.turns of twine around a rope end

5.單項(xiàng)選擇題A tackle by which the outer end of a boom is raised and lowered is the topping（）.

A.boom
B.lift
C.raise
D.tackle