A.before
B.when
C.after
D.during
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A.maximum counter weight required
B.minimum horsepower required
C.hoist rope strength
D.allowable load
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
最新試題
Sudden starts or stops of the boom is likely to cause all of the following except（）.
How should you signal the crane operator to hoist（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
On no account（）to be exceeded.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Damage by（）shall not be considered as handling damage.
When discharging an oil cargo，the first consideration is to（）.
How should you signal the crane operator to move slowly（）.