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
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Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
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（）.