A.which
B.where
C.when
D.how
您可能感興趣的試卷
你可能感興趣的試題
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
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
最新試題
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
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 of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
How should you signal the crane operator to hoist（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
When using slings，cargo handlers should take all the following precautions except（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.