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
Most pedestal crane power is provided by（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
On no account（）to be exceeded.
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 statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
When discharging an oil cargo，the first consideration is to（）.