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
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
How should you signal the crane operator to hoist（）.
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
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（）.
Most pedestal crane power is provided by（）.