The cetane number of a diesel fuel oil indicates its ______.A.viscosityB.acid contentC.heating valueD.ignition quality

题目

The cetane number of a diesel fuel oil indicates its ______.

A.viscosity

B.acid content

C.heating value

D.ignition quality

相似考题

1.Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?A.ViscosityB.Sulfur contentC.Pour pointD.Cetane number

2.The cetane number of a diesel fuel oil indicates its ______.A.ignition qualityB.acid contentC.heating valueD.viscosity

3.Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.A.using fuel oil with low cetane numberB.a badly worn piston pinC.a loose flywheel keyD.a loose bed plate bolt

4.Which of the following represents the significance the fuel oil cetane number?A.The cetane number has no affect on injection lagB.The cetane number is an indication of the fuel's viscosityC.Ignition lag is reduced with fuels having a high cetane numberD.The cetane number is of little significance in the combustion process

更多“The cetane number of a diesel fuel oil indicates its ______.A.viscosityB.acid contentC.hea ”相关问题

  • 第1题：

    单选题
    A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.
    A

    contaminated with sludge

    B

    contaminated with carbon

    C

    diluted with fuel oil

    D

    diluted with water


    正确答案： B
    解析： 暂无解析

  • 第2题：

    单选题
    Fuel oil having a low cetane rating could result in（）
    A

    improved cold weather starting

    B

    excessive fuel oil consumption

    C

    reduced ignition lag

    D

    smoother engine operation


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）
    A

    Water discharging from the water outlet of the lube oil purifier

    B

    Fuel oil discharging from the water outlet of the lube oil purifier

    C

    Lube oil discharging from the water outlet of the lube oil purifier

    D

    A change in the lube oil viscosity


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following statements is true concerning the cetane number of diesel fuel?（）
    A

    The cetane number affects the amount of injection lag

    B

    The cetane number is an indication of the fuels viscosity

    C

    Ignition lag is reduced with fuels having a high cetane number

    D

    The cetane number is of little significance in the combustion process


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the following statements is true concerning the cetane number rating of diesel fuel? （）
    A

    The cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbon

    B

    The higher the cetane number, the shorter the ignition lag

    C

    The highest cetane number of fuel is 100

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    The cetane number of a diesel fuel oil indicates its（）
    A

    Viscosity

    B

    acid content

    C

    heating value

    D

    ignition quality


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Injection lag in a diesel engine may be caused by（）
    A

    a higher cetane number of fuel oil

    B

    the diesel fuel used having a high viscosity

    C

    mechanical rigidity in the lube pump mechanism

    D

    a decrease rigidity in the fuel pump delivery pressure


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）
    A

    electronic ignition system

    B

    compression of air by the piston

    C

    friction in the fuel injector

    D

    fuel oil bearing system


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    After the ship is out of the harbour and in “Full Speed”, well change （）.
    A

    to fuel oil instead of diesel oil

    B

    for fuel oil instead of diesel oil

    C

    to diesel oil into fuel oil

    D

    for diesel oil into fuel oil


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    If the chemical analysis of a lube oil sample taken from a diesel engine indicates an increased neutralization number, the （）.
    A

    acidity has increased

    B

    viscosity has decreased

    C

    demulsibility has improved

    D

    foaming is guaranteed to occur


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    The cetane rating of diesel fuel is an indication of the （）
    A

    ignition quality of the fuel

    B

    calorific value of the fuel

    C

    flash point of the fuel

    D

    rate of fuel consumption


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    A mixture of 45%cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil √The sample can be described as having a/an（）
    A

    cetane number of 55

    B

    cetane number of 45

    C

    octane number of 55

    D

    octane number of 45


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Black smoke exhausting from a diesel engine indicates（）
    A

    proper fuel injection

    B

    water in the fuel

    C

    incomplete combustion

    D

    burning of lube oil


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
    A

    filter to remove the fuel oil

    B

    use the settler to remove the fuel oil

    C

    remove the fuel oil by centrifuging

    D

    drain and then renew the lube oil supply


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    Duty officer informs us that the vessel is out of harbor and in “Full Ahead”We are going to run （）.
    A

    diesel oil instead of fuel oil

    B

    fuel oil instead of diesel oil

    C

    diesel oil instead fuel oil

    D

    fuel oil instead diesel oil


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    The cetane number rates fuels for diesel engines according to its （）
    A

    antiknock characteristics

    B

    ignition qualities

    C

    rates of vaporization

    D

    viscosity


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    The higher the cetane number, （） the ignition quality of the fuel.
    A

    the worse

    B

    the better

    C

    the smaller

    D

    the greater


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    The Total Base Number (TBN) value of diesel engine lube oil refers to its ability to （）
    A

    resist changes in viscosity with changes in temperature

    B

    resist emulsification

    C

    neutralize acids

    D

    resist oxidation at high temperatures


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
    A

    early injection timing

    B

    worn orifices in the injection nozzles

    C

    worn or scored cylinder liners

    D

    using a fuel with too low of a cetane number


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    When fuel enters the crankcase of a diesel engine, it （）
    A

    dilutes the lube oil and reduces its viscosity

    B

    forms sulfuric acid in the lube oil

    C

    causes pitting and failure of the bearings

    D

    causes sludge deposits on valve stems


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）
    A

    changed

    B

    centrifuged

    C

    filtered

    D

    settled


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following represents the significance the fuel oil cetane number?（）
    A

    The cetane number has no affect on injection lag

    B

    The cetane number is an indication of the fuel’s viscosity

    C

    Ignition lag is reduced with fuels having a high cetane number

    D

    The cetane number is of little significance in the combustion


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Clogged diesel engine fuel oil filters can cause（）
    A

    loss of power

    B

    misfiring

    C

    low fuel oil pressure

    D

    All of the above


    正确答案： A
    解析： 暂无解析

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