A.Hydraulic drive systems
B.Electric drive systems
C.Steam drive systems
D.Man-powered drive systems
您可能感興趣的試卷
你可能感興趣的試題
A.a master controller or switchbox
B.a group of relays
C.contactors
D.a solenoid brake
A.one meter from the tank bottom and one meter below the tank top
B.one half the ullage of the tank and one meter below the tank top
C.one half the ullage of the tank and one meter above the tank bottom
D.at three meter intervals from the tank top
A.winch speed
B.boom strength
C.load radius
D.cable strength
A.discharging
B.recircling
C.loading
D.taking in
A.one meter from the tank bottom and one meter below the tank top
B.one half the ullage of the tank and one meter below the tank top
C.one half the ullage of the tank and one meter above the tank bottom
D.at three meter intervals from the tank top
最新試題
Running an electric winch at slow speed over a long period of time causes（）.
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
When using slings，cargo handlers should take all the following precautions except（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
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 hoist（）.
The net productivity per gang-hour can be improved through a decrease of（）.