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
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A.boom
B.lift
C.raise
D.tackle
A.riding pawl
B.buckler
C.devil's claw
D.locking ring
A.short splice
B.long splice
C.back splice
D.spindle splice
A.boat fall
B.fairlead
C.riding pawl
D.topping lift
A.block used only with manila rope
B.chock roller
C.hinged block
D.strong block used for short，sharp pulls
最新試題
The size of wire rope is determined by the（）.
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.
The standing part of a tackle is（）.
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?（）.
Back-up wires on a towed vessel provide（）.
The purpose of a devil’s claw is to（）.
Limit switches on gravity davits should be tested by（）.
The rope which is rove from the truck to be used with a bos’n chair is called a（）.
The rope which is the lightest is（）.
The square knot is used for（）.