A.flat
B.up
C.upright
D.vertical
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A.moors
B.moor
C.is moored
D.mooring
A.which
B.where
C.when
D.how
A.before
B.when
C.after
D.during
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
最新試題
When viewed from above，the best position for the guy in relation to the boom is（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
How should you signal the crane operator to lower the boom and raise the load（）.
The Master or person in charge of a ship shall ensure the crane record book shows the（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
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 part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
How should you signal the crane operator to move slowly（）.