A.A centerline crane can never be operated in tandem
B.One crane is able to work one end of two adjacent hatches
C.These cranes are more economical and weigh less than outboard-mounted cranes
D.One crane is able to work both sides of the ship
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A.The cranes may be operated independently
B.The cranes may be interconnected for twin operation
C.When twinned，the crane rotation on the foundation assembly is unlimited
D.All of the above
A.The cranes may be operated independently
B.The cranes may be interconnected for twin operation
C.The cranes are powered by independent internal combustion power units
D.All of the above
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
A.The loading dock
B.The midpoint of the barge
C.Within 25 feet of the pump engine
D.Above the forward rake end
A.At a 45° angle
B.At right angles
C.4 feet aft of the heel of the boom
D.Parallel to the boom
最新試題
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
On no account（）to be exceeded.
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 lower the boom and raise the load（）.
When discharging an oil cargo，the first consideration is to（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
The net productivity per gang-hour can be improved through a decrease of（）.