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
They（）loading at 1400 hours．
Damage by（）shall not be considered as handling damage.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
How should you signal the crane operator to hoist（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
The item（）is not the advantage of the hydraulic winch．
When using slings，cargo handlers should take all the following precautions except（）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.