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
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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
A.Ensure that slings are securely fastened around the load
B.Avoid careless winch operations，especially when handling fragile cargo
C.Exercise care when using hooks，crowbars，and similar tools
D.Keep the loads as close to the rail or deck as possible
最新試題
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
When viewed from above，the best position for the guy in relation to the boom is（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
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（）.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
On no account（）to be exceeded.
Running an electric winch at slow speed over a long period of time causes（）.
Which statement comparing a shipboard crane to conventional gear is TRUE（）.