此题为多项选择题。
第1题
The boom stops on a pedestal crane prevent the boom from ______.
A.being raised too high
B.swinging at sea
C.overloading when not in use
D.being lowered too low
第2题
The boom stops are installed on an offshore crane to ______.
A.prevent the boom from being raised too high
B.prevent the boom from swinging
C.support the boom when not in use
D.prevent the boom from being lowered
第3题
The crane is usually mounted on a pedestal to offer adequate _____ to the operator.
A.time
B.space
C.length
D.visibility
第4题
The boom indicator on a crane will indicate the ______.
A.Length of the boom
B.Angle of the boom
C.Lifting capacity of the boom
D.Direction of the boom
第5题
Most pedestal crane power is provided by ______.
A.Electro-hydraulic units
B.Steam units
C.Independent internal combustion power units
D.All of the above
第6题
What does “evel-luffing” accomplish during crane operations ________.
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
第7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
第8题
Which wire rope purchases may be used with a 30-ton pedestal crane ________.
A.Hoist
B.Luff
C.Rider block
D.All of the above
第9题
During which condition should be operator of a pedestal crane shutdown operations?
A.Bunkering
B.High winds
C.Potable water spill on deck
D.More than 3°list
第10题
During which condition should the operator of a pedestal crane shutdown operations ()
A.Lightning in the vicinity
B.An approaching squall line
C.A fire on the pier
D.All of the above
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