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
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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
A.discharging
B.recircling
C.loading
D.taking in
最新試題
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（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
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（）.
The item（）is not the advantage of the hydraulic winch．
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
They（）loading at 1400 hours．