单选题The primary purpose of oil control rings on a diesel piston is to（）A provide a reservoir for cylinder lubricationB pump oil into the combustion space for cylinder coolingC prevent excessive lubricating oil consumptionD allow hydraulic oil film formatio

题目
单选题
The primary purpose of oil control rings on a diesel piston is to（）
A

provide a reservoir for cylinder lubrication

B

pump oil into the combustion space for cylinder cooling

C

prevent excessive lubricating oil consumption

D

allow hydraulic oil film formation on the cylinder

相似考题

1.Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?A.Control the amount of lube oil burned in the combustion chamberB.Transmit heat from the piston to the cylinder linerC.Prevent damage to ring groove inserts by acting as a heat damD.Dissipate combustion chamber gas pressure by channeling it through the ring gap

2.单选题If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）A The oil control rings will seal improperly and wear rapidlyB The piston will overheat due to insufficient lubricationC Excessive oil will remain on the cylinder wallD Light brown smoke will emanate from the engine exhaust

3.单选题Worn main bearings in a diesel engine can result in （）A decreased compression pressureB increased lube oil pressureC lower lube oil temperatureD excessive leakage past the piston rings

4.The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.A.fed from mechanical lubricatorsB.thrown off from the main bearingsC.supplied from wick fed drip lubricatorsD.flow from a centrifugal or banjo oiler

更多“The primary purpose of oil control rings on a diesel piston”相关问题

  • 第1题：

    单选题
    To function properly, oil control rings used on a diesel engine piston must distribute sufficient oil to all parts of the cylinder wall and must also（）.
    A

    prevent any lubricant from reaching

    B

    prevent excessive lubrication from reaching the combustion space

    C

    Provide metal-to-metal contact to seal the cylinder against blow-by

    D

    assure a positive means of scraping carbon accumulation from the cylinder


    正确答案： C
    解析： 暂无解析

  • 第2题：

    单选题
    In order to keep excess oil from the intake ports in two-stroke/cycle diesel engines, （）
    A

    wide compression rings are used

    B

    oil rings are located above the piston

    C

    chromium plating is used on all piston rings

    D

    oil rings are located near the bottom of the piston skirt


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.
    A

    oil spray

    B

    oil bath

    C

    oil control rings

    D

    drilled passage through the camshaft


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    Improperly fitted piston rings in a diesel engine can cause（）
    A

    excessive lube oil consumption

    B

    lower than normal lube oil temperature

    C

    higher than normal exhaust back pressure

    D

    excessive crankshaft end play


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
    A

    Control the amount of lube oil burned in the combustion chamber

    B

    Transmit heat from the piston to the cylinder liner

    C

    Prevent damage to ring groove inserts by acting as a heat dam

    D

    Dissipate combustion chamber gas pressure by channeling it through the ring gap


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）
    A

    insufficient lubrication

    B

    improper piston cooling

    C

    blow-by

    D

    overload operation


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）
    A

    increase the liner area covered by the oil film

    B

    maintain an oil film on the lower liner where scuffing is prevalent

    C

    keep excess oil away from intake and exhaust ports

    D

    help cushion piston skirt side thrust by providing a hydrodynamic oil wedge


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    The function of the piston compression rings used in a diesel engine is to （）
    A

    seal the space between the piston and liner

    B

    transmit heat from the piston to the cylinder liner

    C

    reduce the amount of combustion gas blow-by

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）
    A

    gap

    B

    side

    C

    back

    D

    radial


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    The function of diesel engine piston compression rings is to （）.
    A

    prevent piston side thrust

    B

    prevent engine friction losses

    C

    transmit heat from the piston to the cylinder liner

    D

    remove oil from the cylinder combustion space


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    When installing rings on a diesel engine piston, you should check the ring（）
    A

    diametrical tension

    B

    gap clearance

    C

    radial thickness

    D

    face thickness


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    If sludge accumulates on the underside of a diesel engine piston, it will（）
    A

    cause blow-by

    B

    chemically attack the piston skirt

    C

    form an emulsion of lube oil and water

    D

    raise the piston temperature


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.
    A

    an oil seal

    B

    removing heat

    C

    a gas seal

    D

    cooling the piston


    正确答案： D
    解析： 暂无解析

  • 第14题：

    单选题
    Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
    A

    starting the engine while hot

    B

    knurling the piston skirt

    C

    operating the engine overheated

    D

    scuff resistant piston rings


    正确答案： D
    解析： 暂无解析

  • 第15题：

    单选题
    Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause （）.
    A

    low compression pressure

    B

    increased piston wear

    C

    increased cylinder lube oil consumption

    D

    poor contact between compression rings and liner


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）
    A

    residual carbon deposits

    B

    lube oil viscosity breakdown

    C

    uneven heat expansion of the rings

    D

    uneven heat expansion of the piston


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wall
    A

    Ⅰ only

    B

    Ⅱ only

    C

    either Ⅰ or Ⅱ

    D

    neither Ⅰ or Ⅱ


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    The main function of piston compression rings is to （）
    A

    prevent excessive cylinder liner wear

    B

    reduce friction losses in the engine

    C

    seal the space between the piston and the liner

    D

    limit upward flow of lube oil into the combustion space


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    Scuffed cylinder liner surfaces in a diesel engine can result form（）
    A

    starting the engine hot

    B

    knurling the piston skirt

    C

    operating an overheated engine

    D

    using scuff resistant piston rings


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The main purpose of the piston oil scraper rings is to （）.
    A

    seal the space between the piston and the liner

    B

    reduce the amount of lube oil burned in the combustion chamber

    C

    transmit heat from the piston to the cylinder liner

    D

    damp out fluctuations of the piston side thrust


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）
    A

    cylinder valves

    B

    compression rings

    C

    piston skirts

    D

    oil rings


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Piston compression rings used in a diesel engine function to （）
    A

    transfer heat from the cylinder to the piston

    B

    scrape oil from the sides of the piston

    C

    seal the combustion space from the crankcases

    D

    prevent any piston contact with the cylinder liner


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Excessive piston ring wear in a diesel engine will cause（）
    A

    high lube oil viscosity

    B

    increased lube oil consumption

    C

    low lube oil temperatures

    D

    high firing pressures


    正确答案： C
    解析： 暂无解析

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