A.get the bow up
B.discharge from the wings first
C.discharge from the centerline tanks first
D.discharge from amidships first
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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
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
最新試題
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
On no account（）to be exceeded.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
The item（）is not the advantage of the hydraulic winch．