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
Which method should be used to warm up the pump turbines prior to discharge（）.
The net productivity per gang-hour can be improved through a decrease of（）.
Most pedestal crane power is provided by（）.
The Master or person in charge of a ship shall ensure the crane record book shows the（）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
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（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.