A.Cranes are more difficult to secure for sea
B.The spotting area of the conventional gear is larger
C.A crane operator requires more training than the winch operator of a yard and stay rig
D.The yard and stay rig is more flexible in its ability to handle a wider variety of cargoes
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A.Guy
B.Shroud
C.Spider
D.Topping lift
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
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（）.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
How should you signal the crane operator to move slowly（）.
Running an electric winch at slow speed over a long period of time causes（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
When using slings，cargo handlers should take all the following precautions except（）.
Most pedestal crane power is provided by（）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.