The boom stops on a pedestal crane prevent the boom from ______.A.being raised too highB.swinging at seaC.overloading when not in useD.being lowered too low

题目

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

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.With a given load on the cargo hook，the thrust on a cargo boom ______.A.increases as the angle to the horizontal increasesB.increases as the angle to the horizontal decreasesC.is greatest at an angle of 45° and decreases as the boom is raised or loweredD.is least at an angle of 45° and increases as the boom is raised or lowered

3.The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward．This is the signal to ______．A.raise the boomB.raise the hookC.raise the boom and hookD.check the boom stop

4.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

更多“The boom stops on a pedestal crane prevent the boom from ______.A.being raised too highB.s ”相关问题

  • 第1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

  • 第2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3题：

    单选题
    The （）(笨重货) must be handled by jumbo boom or shore crane.
    A

    awkward cargo

    B

    drummed cargo

    C

    cased cargo

    D

    heavy cargo


    正确答案： D
    解析： 暂无解析

  • 第4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5题：

    单选题
    On a ship’s crane，the load chart relates the allowable load to the combination of the boom length and（）.
    A

    winch speed

    B

    boom strength

    C

    load radius

    D

    cable strength


    正确答案： A
    解析： 暂无解析

  • 第6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7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8题：

    单选题
    The load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.
    A

    maximum counter weight required

    B

    minimum horsepower required

    C

    hoist rope strength

    D

    allowable load


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the（）.
    A

    maximum counter weight required

    B

    minimum horsepower required

    C

    hoist rope strength

    D

    allowable load


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    When viewed from above，the best position for the guy in relation to the boom is（）.
    A

    At a 45° angle

    B

    At right angles

    C

    4 feet aft of the heel of the boom

    D

    Parallel to the boom


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.
    A

    vertical position

    B

    horizontal position

    C

    boom stop angle

    D

    minimum radius angle


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.
    A

    boom angle

    B

    boom strength

    C

    load radius

    D

    cable strength


    正确答案： C
    解析： 暂无解析

  • 第13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14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15题：

    单选题
    Which action(s) is/are included in crane operations?（）
    A

    Normal boom stowage and shutdown operations

    B

    Emergency shutdown operation

    C

    Removing booms from stowage

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.
    A

    raise the boom

    B

    raise the hook

    C

    raise the boom and hook

    D

    check the boom stop


    正确答案： B
    解析： 暂无解析

  • 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
    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19题：

    单选题
    A tackle by which the outer end of a boom is raised and lowered is the topping（）.
    A

    boom

    B

    lift

    C

    raise

    D

    tackle


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Sudden starts or stops of the boom is likely to cause all of the following except（）.
    A

    breaking a cargo runner

    B

    parting guys topping lifts

    C

    carrying away a block

    D

    overheating the resistors and eventually burning out


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    With a given load on the cargo hook，the thrust on a cargo boom（）.
    A

    increases as the angle to the horizontal increases

    B

    increases as the angle to the horizontal decreases

    C

    is greatest at an angle of 45° and decreases as the boom is raised or lowered

    D

    is least at an angle of 45° and increases as the boom is raised or lowered


    正确答案： B
    解析： 暂无解析

  • 第22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

  • 第23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

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