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
您可能感興趣的試卷
你可能感興趣的試題
A.started
B.finished
C.completed
D.reported
A.Cranes/derricks
B.Crane/derrick cycles
C.Crane/derrick cycle time
D.Weight per package
A.Date and description of each failure
B.Average load in pounds for each usage
C.Total number of lifts for each usage
D.All of the above
A.less jerky starts
B.less jerky stops
C.overheating worries
D.none of the overheating worries
A.breaking a cargo runner
B.parting guys topping lifts
C.carrying away a block
D.overheating the resistors and eventually burning out
最新試題
Running an electric winch at slow speed over a long period of time causes（）.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
When using slings，cargo handlers should take all the following precautions except（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
Most pedestal crane power is provided by（）.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
How should you signal the crane operator to hoist（）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.