A.Cranes are able to pick up and drop loads over a greater spotting area
B.Increased safety because the deck is clear of running and standing rigging
C.Simplicity of operation of the crane by its operator
D.All of the above
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A.It allows for rotation of the hook in the single mode
B.It is required to“twin-up”30-ton pedestal cranes
C.It is used to pick up light loads
D.It is used to rigidly connect two cranes
A.Stopping the boom
B.Topping or lowering the boom
C.Moving the boom left or right
D.All of the above
A.It prevents the load from swinging when the boom level is adjusted
B.Less power is needed when topping the boom with a load on the hook
C.It maintains the height of the load above the deck
D.All of the above
A.started
B.finished
C.completed
D.reported
A.Cranes/derricks
B.Crane/derrick cycles
C.Crane/derrick cycle time
D.Weight per package
最新試題
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
What does “evel-luffing” accomplish during crane operations（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
How should you signal the crane operator to move slowly（）.
Most pedestal crane power is provided by（）.
How should you signal the crane operator to lower the boom and raise the load（）.
The Master or person in charge of a ship shall ensure the crane record book shows the（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
They（）loading at 1400 hours．
When discharging an oil cargo，the first consideration is to（）.