A.hoisting cargo aboard a vessel
B.hoisting personnel aboard a vessel
C.securing a small boat to a large vessel
D.hoisting the anchor
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A.slipway
B.graving dock
C.ground warp
D.caisson dock
A.Moving high weights lower
B.Adding weight at the tipping center
C.Moving a weight forward
D.Moving lower weight high
最新試題
They（）loading at 1400 hours．
How should you signal the crane operator to move slowly（）.
Running an electric winch at slow speed over a long period of time causes（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
When using slings，cargo handlers should take all the following precautions except（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
The net productivity per gang-hour can be improved through a decrease of（）.