单选题A boom vang（）.A holds the boom down and flattens the main sailB draws the head of the sail to windwardC tautens the standing riggingD douses the gaff topsail

题目
单选题
A boom vang（）.
A

holds the boom down and flattens the main sail

B

draws the head of the sail to windward

C

tautens the standing rigging

D

douses the gaff topsail

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.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 increasesB.is at a maximum when the boom is at a 45° angle to the horizontalC.increases as the boom's angle to the horizontal decreasesD.decreases as the boom's angle to the horizontal decreases

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

更多“A boom vang（）.”相关问题

  • 第1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：A

  • 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：

    A boom vang ______.

    A.holds the boom down and flattens the main sail

    B.draws the head of the sail to windward

    C.tautens the standing rigging

    D.douses the gaff topsail


    正确答案：A
    吊杆张索把持吊杆向下和主帆变平。

  • 第4题：

    ASP（音频控制面板）的正常位置是（）

    • A、MASK／BOOM开关在BOOM位；ALT／NORM开关在NORM位
    • B、MASK／BOOM开关在MASK位；ALT／NORM开关在NORM位
    • C、MASK／BOOM开关在MASK位；ALT／NORM开关在ALT位
    • D、MASK／BOOM开关在BOOM位；ALT／NORM开关在ALT位

    正确答案:A

  • 第5题：

    起重机（）

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

    正确答案:C

  • 第6题：

    单选题
    What is meant by the term TOPPING THE BOOM?（）
    A

    Lowering the boom

    B

    Raising the boom

    C

    Spotting the boom over the deck

    D

    Swinging the boom athwartships


    正确答案： C
    解析： 暂无解析

  • 第7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8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9题：

    单选题
    The hinge fitting used to attach the boom to the mast is the（）.
    A

    gooseneck

    B

    step

    C

    swivel

    D

    pintle


    正确答案： D
    解析： 暂无解析

  • 第10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11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 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：A

  • 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：

    I系列MSC中，VANG_A位于（）单元。

    • A、M
    • B、CM
    • C、OMU
    • D、CCM

    正确答案:D

  • 第16题：

    There is no power for the （）(起货机).

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

    正确答案:A

  • 第17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18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19题：

    单选题
    The process of lowering a boom to a horizontal position and onto its deck support is called（）.
    A

    spotting a boom

    B

    collaring a boom

    C

    cradling a boom

    D

    toppling a boom


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    For a given weight of cargo，the stress on the heel block of a cargo boom（）.
    A

    increases as the cargo closes the head while hoisting

    B

    increases if the cargo runner is doubled up

    C

    decreases as the boom is topped to a greater angle

    D

    is determined by the thrust stresses on the boom


    正确答案： B
    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
    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23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

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