A.anchor the boat
B.pick up heavy loads
C.protect fiber rope from abrasion
D.strengthen mooring lines
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A.for portable fenders
B.for ground tackle
C.on the inside of the hawsepipe
D.on mooring lines
A.a factor of safety
B.additional strength
C.a distribution of the towing load
D.All of the above
A.the total weight in air of the casing string is removed from the ship
B.the hook load (weight of the casing string) is removed from the ship
C.the weight of the casing inside the riser is removed from the ship
D.the weight of the casing string added to the weight of the fill-up mud is removed from the ship
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
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
最新試題
Extended cyclical variations in tensions will cause an anchor chain to break due to（）.
Cribbing is（）.
Manila lines in which the strands are right-hand laid（）.
A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.
The square knot is used for（）.
The only wire rope termination which may be made in the field is（）.
Limit switches on gravity davits should be tested by（）.
Anchor shackles should have a breaking strength that is（）.
The purpose of a devil’s claw is to（）.
A splice that can be used in running rigging，where the line will pass through blocks，is a（）.