单选题At bottom dead center, the centerline of the connecting rod usually coincides with the（）A angularity of the piston motionB inertia moment from the pistonC centerline of the cylinderD centerline of the king pin

题目
单选题
At bottom dead center, the centerline of the connecting rod usually coincides with the（）
A

angularity of the piston motion

B

inertia moment from the piston

C

centerline of the cylinder

D

centerline of the king pin

相似考题

1.A vessel may acquire a list if the center of gravity is ______. ① Off the centerline. ② Too high in the vessel.A.① onlyB.② onlyC.Either ① or ②D.Neither ① nor ②

2.At all angles of inclination, the metacenter is ______.A.vertically above the center of buoyancyB.vertically above the center of gravityC.at the intersection of the upright vertical centerline and the line of action of the buoyant forceD.at the geometric center of the underwater volume

3.从水线到船底是“吃水”。（）A、“From the centerline to the ship’s bottom” is “draft”.B、“From the keel to the ship’s bottom” is “draft”.C、The maximum distance from the waterline to the ship’s bottom is “draft”.D、“From the centerline to the ship’s main deck” is “draft”.

4.An unstable upright equilibrium position on a vessel means that the metacenter is ______.A.lower than the center of gravityB.at the same height as the center of gravityC.higher than the baselineD.on the longitudinal centerline

更多“At bottom dead center, the centerline of the connecting rod”相关问题

  • 第1题：

    单选题
    Abnormal crankpin bearing and piston skirt surface wear indicate（）
    A

    a restricted air intake

    B

    a clogged connecting rod oil passage

    C

    incorrect connecting rod alignment

    D

    high cylinder firing temperatures


    正确答案： C
    解析： 暂无解析

  • 第2题：

    单选题
    The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）
    A

    the connecting rod

    B

    large end bearing

    C

    the main bearing

    D

    the design


    正确答案： D
    解析： 暂无解析

  • 第3题：

    单选题
    A connecting rod in a four-stroke/cycle diesel engine is subject to（）
    A

    tension load twice each crankshaft revolution

    B

    compression load during power and compression strokes

    C

    inertia load once every four crankshaft revolutions

    D

    bending loads at bottom and top dead center


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）
    A

    Decreased connecting rod bearing clearance

    B

    Increased connecting rod bearing clearance

    C

    Decreased compression ratio

    D

    Increased compression ratio


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    Aboard a ship，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.
    A

    LCG

    B

    transverse moment

    C

    righting moment

    D

    inclining moment


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    The center of buoyancy is located at the（）.
    A

    geometric center of the waterplane area

    B

    intersection of the vertical centerline and line of action of the buoyant force

    C

    center of gravity of the vessel corrected for free surface effects

    D

    geometric center of the displaced volume


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.
    A

    the crank-web

    B

    the connecting rod

    C

    the main bearing

    D

    the cross-head


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    Generally the gudgeon pin is fully floating in both connecting rod small end and （）.
    A

    the crosshead

    B

    the crankshaft

    C

    large end

    D

    the piston bosses


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    The slippers run （） in the crosshead guides as the piston and rod are （）and prevent the top of the connecting rod from moving sideways.
    A

    up and down；reciprocating

    B

    up and down；rotating

    C

    back and forth；reciprocating

    D

    back and forth；rotating


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
    A

    so a height

    B

    such a height

    C

    so high

    D

    such high


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
    A

    Stationary

    B

    Full floating

    C

    Semi-floating

    D

    Free rolling


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    从水线到船底是“吃水”。（）
    A

    “From the centerline to the ship’s bottom” is “draft”.

    B

    “From the keel to the ship’s bottom” is “draft”.

    C

    The maximum distance from the waterline to the ship’s bottom is “draft”.

    D

    “From the centerline to the ship’s main deck” is “draft”.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.
    A

    connecting rod

    B

    piston rod

    C

    bearing housing

    D

    none of the above


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    The small end of the connecting rod is attached to the piston with a （）.
    A

    crankpin

    B

    sliding wedge

    C

    wrist pin

    D

    torque bashing


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.
    A

    telescopic pipes

    B

    large bore

    C

    drilled passage

    D

    tied rod


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    A piston is at bottom dead center when it is（）
    A

    opening the exhaust ports

    B

    closing the fuel ports

    C

    farthest from the cylinder head

    D

    nearest to the cylinder head


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    Because the top of the connecting rod swings about the pin and changes direction each time the piston reaches mid-stroke, the relative speed between bearing and pin at mid-stroke is zero, （）to a maximum as the piston approaches top or bottom dead center and then （） back to zero again as the piston approaches mid-stroke and the connecting rod changes direction.
    A

    accelerates；decelerates

    B

    accelerates；accelerates

    C

    decelerates；decelerates

    D

    decelerates；accelerates


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    An increase in crankcase pressure generally indicates（）
    A

    worn connecting rod bearings

    B

    worn engine cylinder liners

    C

    high cylinder firing pressure

    D

    stuck spring-loaded manhole covers


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）
    A

    torque wrench

    B

    monkey wrench

    C

    pipe wrench

    D

    slugging wrench


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The exhaust valve opens before bottom dead center in a four stroke engine to（） Ⅰ.allow for blow down Ⅱ.Reduce pumping losses
    A

    Ⅰ only

    B

    Ⅱ only

    C

    both Ⅰ and Ⅱ

    D

    neither Ⅰ nor Ⅱ


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    An unstable upright equilibrium position on a vessel means that the metacenter is（）.
    A

    lower than the center of gravity

    B

    at the same height as the center of gravity

    C

    higher than the baseline

    D

    on the longitudinal centerline


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    At all angles of inclination, the metacenter is（）.
    A

    vertically above the center of buoyancy

    B

    vertically above the center of gravity

    C

    at the intersection of the upright vertical centerline and the line of action of the buoyant force

    D

    at the geometric center of the underwater volume


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    The design of （） is similar to that of the main bearing.
    A

    the block bearing

    B

    the camshaft bearing

    C

    the connecting rod small end bearing

    D

    the connecting rod large end bearing


    正确答案： A
    解析： 暂无解析

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