A.manila
B.nylon
C.polypropylene
D.dacron
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A.increases the strength of the hook
B.prevents the sling ring from coming out of the hook if the strain is abruptly eased
C.prevents the sling ring from coming out of the hook if there is a strain on the sling ring
D.All of the above
A.square knot
B.carrick bend
C.sheet bend
D.bowline
A.square knot
B.carrick bend
C.becket bend
D.sheepshank
A.monkey's fist
B.ball or baseball knot
C.heaving knot
D.three strand Turk's head
A.at the base of the boom
B.at the cargo hook
C.near the midships guy
D.near the spider band
最新試題
What is the bow type anchor shackle primarily used for（）.
Nylon line is better suited than manila for（）.
When cutting wire rope，seizings are put on each side of the cut.The seizings prevent the wire from unlaying and also（）.
The strongest of the natural fiber ropes is（）.
When riveted joints occur at the ends of plating they are called（）.
The tackle that raises and lowers the boom is（）.
Manila slings should not be used to load（）.
The rope which is rove from the truck to be used with a bos’n chair is called a（）.
Which knot reduces the strength of a line by the LEAST amount（）.
What material may be substituted for zinc when making a poured metal socket ending to a wire rope（）.