A.three wire rope clamps
B.an eye splice with four or five tucks
C.a thimble fastened with four or five tucks
D.a wire rope socket attached with zinc
您可能感興趣的試卷
你可能感興趣的試題
A.all the fall except the hauling part
B.the hook that engages the weight to be moved
C.that part to which power is applied
D.that part of the falls made fast to one of the blocks
A.forming temporary eyes in lines
B.joining two lines of equal size
C.keeping line from unlaying or fraying
D.joining two lines of different size
A.number of strands
B.number of wires in each strand
C.circumference
D.diameter
A.raise the boom
B.raise the hook
C.raise the boom and hook
D.check the boom stop
A.manila
B.nylon
C.polypropylene
D.dacron
最新試題
The main function of the core of a wire rope is to（）.
The size of wire rope is determined by the（）.
A tackle by which the outer end of a boom is raised and lowered is the topping（）.
The standing part of a tackle is（）.
The purpose of a devil’s claw is to（）.
A whipping is（）.
Herringbone is a term associated with（）.
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（）.
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.
In moderate wind and current what should be the length of chain with a single anchor?（）