A.maximum counter weight required
B.minimum horsepower required
C.hoist rope strength
D.allowable load
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A.horizontal position of the boom
B.vertical position of the boom
C.horizontal position of the load being lifted
D.vertical position of the load being lifted
A.length of the boom
B.angle of the boom
C.lifting capacity of the boom
D.direction of the boom
A.to use
B.to operate
C.maneuvering
D.using
A.is the S.W.L. of the crane
B.are the S.W.L. of the crane
C.the S.W.L. of the crane is
D.the S.W.L.of the crane are
A.boom angle
B.boom strength
C.load radius
D.cable strength
最新試題
How should you signal the crane operator to lower the boom and raise the load（）.
Running an electric winch at slow speed over a long period of time causes（）.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
When discharging an oil cargo，the first consideration is to（）.