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For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．A.unchangedB.increasedC.eliminatedD.decreased

题目

For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．

A.unchanged

B.increased

C.eliminated

D.decreased

相似考题

1.On a crane, the boom indicator tells the operator what angle the boom angle is compared to the ______.A.vertical positionB.horizontal positionC.boom stop angleD.minimum radius angle

2.The boom stops are installed on an offshore crane to ______.A.prevent the boom from being raised too highB.prevent the boom from swingingC.support the boom when not in useD.prevent the boom from being lowered

3.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

4.What cargo does a jumbo boom or heavy derrick used for lifting?

更多“For any given pedestal crane,when the boom is lengthened,the lifting capacity is ______.A. ”相关问题

  • 第1题：

    With a given load on the cargo hook，tension in a single span topping lift ______.

    A.increases as the boom's angle to the horizontal increases

    B.is at a maximum when the boom is at a 45° angle to the horizontal

    C.increases as the boom's angle to the horizontal decreases

    D.decreases as the boom's angle to the horizontal decreases


    正确答案：C

  • 第2题：

    The boom indicator on a crane will indicate the ______．

    A.Length of the boom

    B.Angle of the boom

    C.Lifting capacity of the boom

    D.Direction of the boom


    正确答案：B

  • 第3题：

    What is meant by the term“luffing the boom”of a crane ________．

    A.Stopping the boom

    B.Topping or lowering the boom

    C.Moving the boom left or right

    D.All of the above


    正确答案：B

  • 第4题：

    Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set ________．

    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


    正确答案：D

  • 第5题：

    单选题
    For any given pedestal crane,when the boom is lengthened, the lifing capacity is（）.
    A

    unchanged

    B

    increased

    C

    eliminated

    D

    decreased


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    When the derrick changes its （）(角度), its lifting capacity changes correspondingly.
    A

    angel

    B

    length

    C

    height

    D

    angle


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    During which condition should the operator of a pedestal crane shutdown operations?（）
    A

    Lightning

    B

    High winds

    C

    Fire aboard

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which action(s) should the operator of a pedestal crane take if crane control is lost?（）
    A

    Let go of both control levers and return to neutral position

    B

    Press the emergency stop

    C

    Notify the mate on watch

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    The boom stops are installed on an offshore crane to（）.
    A

    prevent the boom from being raised too high

    B

    prevent the boom from swinging

    C

    support the boom when not in use

    D

    prevent the boom from being lowered


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.
    A

    winch speed

    B

    boom strength

    C

    load radius

    D

    cable strength


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    With a given load on the cargo hook，tension in a single span topping lift（）.
    A

    increases as the boom's angle to the horizontal increases

    B

    is at a maximum when the boom is at a 45° angle to the horizontal

    C

    increases as the boom's angle to the horizontal decreases

    D

    decreases as the boom's angle to the horizontal decreases


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    The boom indicator on a crane will indicate the（）.
    A

    length of the boom

    B

    angle of the boom

    C

    lifting capacity of the boom

    D

    direction of the boom


    正确答案： B
    解析： 暂无解析

  • 第13题：

    The boom stops on a pedestal crane prevent the boom from ______.

    A.being raised too high

    B.swinging at sea

    C.overloading when not in use

    D.being lowered too low


    正确答案：A

  • 第14题：

    What does “evel-luffing” accomplish during crane operations ________．

    A.It prevents the load from swinging when the boom level is adjusted

    B.Less power is needed when topping the boom with a load on the hook

    C.It maintains the height of the load above the deck

    D.All of the above


    正确答案：D

  • 第15题：

    When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to ______．

    A.winch speed

    B.boom strength

    C.load radius

    D.cable strength


    正确答案：C

  • 第16题：

    A （）is used for lifting long heavy cargo.

    • A、derrick
    • B、crane
    • C、jumbo boom
    • D、boom

    正确答案:C

  • 第17题：

    单选题
    The boom stops on a pedestal crane prevent the boom from（）.
    A

    being raised too high

    B

    swinging at sea

    C

    overloading when not in use

    D

    being lowered too low


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    What is meant by the term“luffing the boom”of a crane（）．
    A

    Stopping the boom

    B

    Topping or lowering the boom

    C

    Moving the boom left or right

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    The crane is usually mounted on a pedestal to offer adequate （） to the operator.
    A

    time

    B

    space

    C

    length

    D

    visibility


    正确答案： D
    解析： 暂无解析

  • 第20题：

    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 slings

    B

    During any cargo handling operation，the safety of personnel is paramount

    C

    Cargo handlers must be outfitted with adequate protection from personal injury

    D

    All the above


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    For any given pedestal crane，when the boom is lengthened，the lifting capacity is（）.
    A

    unchanged

    B

    increased

    C

    eliminated

    D

    decreased


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Any friction fit, tightness or adhesion of the part of any load being lifted should be broken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, （）
    A

    the lifting appliance can always lift the freight within its rated load

    B

    attention should be paid in order not to break the wedge when lifting cargo

    C

    sometimes the lifting work needs other assistance other than the lifting appliance

    D

    lifting work should be done with every part fit, tightness or adhesion


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    What does “evel-luffing” accomplish during crane operations（）.
    A

    It prevents the load from swinging when the boom level is adjusted

    B

    Less power is needed when topping the boom with a load on the hook

    C

    It maintains the height of the load above the deck

    D

    All of the above


    正确答案： D
    解析： 暂无解析

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