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Which statement is FALSE regarding the operation of a crane ________．
A.The crane jib is raised and lowered by the luffing winch
B.The cargo block is raised and lowered by the hoisting winch
C.The cargo block is raised and lowered by the luffing winch
D.None of the above
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更多 “ Which statement is FALSE regarding the operation of a crane ________．A.The crane jib is raised and lowered by the luffing winchB.The cargo block is raised and lowered by the hoisting winchC.The cargo block is raised and lowered by the luffing winchD.None of the above ” 相关考题
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the SWL of the crane isD
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The cranes may be interconnected for twin operationC
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All of the above
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Let go of both control levers and return to neutral positionB
Press the emergency stopC
Notify the mate on watchD
All of the above
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单选题Which statement(s) is/are TRUE concerning crane cargo operations? （）A
Do not exceed rated load capacity of crane and container spreader or slingsB
During any cargo handling operation，the safety of personnel is paramountC
Cargo handlers must be outfitted with adequate protection from personal injuryD
All the above
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单选题The crane jib is raised and lowered by means of （）A
a mooring winchB
a hoisting winchC
a slewing winchD
a luffing winch
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单选题Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.A
A centerline crane can never be operated in tandemB
One crane is able to work one end of two adjacent hatchesC
These cranes are more economical and weigh less than outboard-mounted cranesD
One crane is able to work both sides of the ship
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单选题In a ordinary cargo crane, （） is fitted to rotate the crane.A
the slewing motorB
the lulling motorC
the hoisting motorD
none of the above
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单选题In a general cargo crane, （） is fitted to raise or lower the jib.A
the slewing motorB
the luffing motorC
the hoisting motorD
none of the above
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