A.slipway
B.graving dock
C.ground warp
D.caisson dock
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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
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
On no account（）to be exceeded.
Which method should be used to warm up the pump turbines prior to discharge（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
How should you signal the crane operator to lower the boom and raise the load（）.