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
The net productivity per gang-hour can be improved through a decrease of（）.
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
They（）loading at 1400 hours．
How should you signal the crane operator to move slowly（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
Which method should be used to warm up the pump turbines prior to discharge（）.
On no account（）to be exceeded.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
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．