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
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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
A.keeps the ends from fraying
B.strengthens it
C.protects your hands
D.becomes part of a splice
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
A.boom
B.lift
C.raise
D.tackle
A.riding pawl
B.buckler
C.devil's claw
D.locking ring
最新試題
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 rope which is rove from the truck to be used with a bos’n chair is called a（）.
The purpose of a devil’s claw is to（）.
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.
In securing a towing cable，consideration must be given to letting go in an emergency. The possible whip of towlines when released can be overcome by（）.
Chafing gear is used to（）.
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.
Back-up wires on a towed vessel provide（）.
A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.
Extended cyclical variations in tensions will cause an anchor chain to break due to（）.