A.Hoist upper & lower limits
B.Luff travel limits
C.Rider block hoist upper & lower limits
D.All of the above
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A.is the SWL of the crane
B.are the SWL of the crane
C.the SWL of the crane is
D.the SWL of the crane are
A.executed
B.located
C.fixed
D.measured
A.Electro-hydraulic units
B.Steam units
C.Independent internal combustion power units
D.All of the above
A.when the line pull reaches the rated winch capacity
B.after the line pull exceeds the rated winch capacity
C.after a short build-up of torque
D.immediately
A.Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signa
B.Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desired
C.First tap your elbow with one hand and then proceed to use regular signals
D.First tap the top of your head with your fist and then proceed to use regular signals
最新試題
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Most pedestal crane power is provided by（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.