A.Ensure that slings are securely fastened around the load
B.Avoid careless winch operations，especially when handling fragile cargo
C.Exercise care when using hooks，crowbars，and similar tools
D.Keep the loads as close to the rail or deck as possible
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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
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
最新試題
How should you signal the crane operator to hoist（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Running an electric winch at slow speed over a long period of time causes（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
When discharging an oil cargo，the first consideration is to（）.
How should you signal the crane operator to move slowly（）.