A.Arch the back to add strength to the muscles
B.Bend his knees and lift with his legs
C.Bend his back and stoop
D.Bend his back and stoop with arms straight
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A.Should not exceed
B.Must be up to
C.Should exceed
D.Should be about
A.get the bow up
B.discharge from the wings first
C.discharge from the centerline tanks first
D.discharge from amidships first
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
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
最新試題
On no account（）to be exceeded.
The Master or person in charge of a ship shall ensure the crane record book shows the（）.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
How should you signal the crane operator to lower the boom and raise the load（）.
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．