A.a master controller or switchbox
B.a group of relays
C.contactors
D.a solenoid brake
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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
A.winch speed
B.boom strength
C.load radius
D.cable strength
最新試題
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
On no account（）to be exceeded.
How should you signal the crane operator to move slowly（）.
When discharging an oil cargo，the first consideration is to（）.
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
The item（）is not the advantage of the hydraulic winch．
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.