A.Guy
B.Shroud
C.Spider
D.Topping lift
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A.Cargo whip
B.Gooseneck fitting
C.Spider band
D.Topping lift
A.Loading
B.Discharging
C.Crude oil washing
D.Steaming tanks
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
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
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（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
On no account（）to be exceeded.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
What does “evel-luffing” accomplish during crane operations（）.
The item（）is not the advantage of the hydraulic winch．
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
What is the purpose of the equalizing beam aboard a crane vessel（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Running an electric winch at slow speed over a long period of time causes（）.