单项选择题
A.get the bow up B.discharge from the wings first C.discharge from the centerline tanks first D.discharge from amidships first
What is/are the advantage(s)of cranes over conventional...
单项选择题What is/are the advantage(s)of cranes over conventional cargo booms().
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
What is the purpose of the equalizing beam aboard a cra...
单项选择题What is the purpose of the equalizing beam aboard a crane vessel().
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
What is meant by the term“luffing the boom”of a crane()...
单项选择题What is meant by the term“luffing the boom”of a crane().
A.Stopping the boom B.Topping or lowering the boom C.Moving the boom left or right D.All of the above