Obviously, for a given fuel oil, its pour point is ______its cloud point.A.lower thanB.higher thanC.as same asD.better than

题目

Obviously, for a given fuel oil, its pour point is ______its cloud point.

A.lower than

B.higher than

C.as same as

D.better than

相似考题

1.For the fuel oil purifier higher throughput and more efficient process can be achieved if the fuel is0A.viscosity a heated to reduce itsB.cooled to reduce its temperatureC.heated to reduce its densityD.heated to reduce its gravity

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

3.Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.A.refrigerant bubbles in the lube oilB.refrigerant reducing the lube oil viscosityC.oxidation(氧化) of the lube oil from overheatingD.reducing the floc or cloud point of the oil

4.The core item in the Oil Record Book Part I is ____, and its main content is____.A.Item A, BALLAST OR CLEANING OF FUEL OIL TANKSB.Item B, DISCHARGE OF DIRTY BALLAST OR CLEANING WATER FROM FUEL OIL TANKS REFERRED TO UNDER SECTION(A)C.Item C, DISPOSAL OF OIL RESIDUES(SLUDGE)D.Item H, BUNKERING OF FUEL OIL

更多“Obviously, for a given fuel oil, its pour point is ______its cloud point.A.lower thanB.hig ”相关问题

  • 第1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：D

  • 第2题：

    As its temperature rises, the volume of fuel oil in the tanks will ______.

    A.remain the same

    B.increase

    C.decrease

    D.can’t be comfirmed


    正确答案：B

  • 第3题：

    单选题
    （） is the temperature at which a liquid fuel gives off sufficient vapor to form an ignitable mixture near its surface.
    A

    Setting point

    B

    Dew point

    C

    Flash point

    D

    Lean point


    正确答案： D
    解析： 暂无解析

  • 第4题：

    单选题
    When considering the lowest fuel system operating temperature, （） are important.
    A

    specific gravity or relative density

    B

    open flash point and closed flash point values

    C

    higher calorific and lower calorific values

    D

    cloud point and pour point values


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    The most common cause of lowering the crankcase lube oil flash point is （）.
    A

    more water contents

    B

    contamination with fuel oil

    C

    higher temperature

    D

    sufficient cooling of oil mist


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
    A

    increase its quality

    B

    obtain complete burning

    C

    reduce its weight

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    As its temperature rises, the volume of fuel oil in the tanks will （）.
    A

    remain the same

    B

    increase

    C

    decrease

    D

    none of the above


    正确答案： D
    解析： 暂无解析

  • 第8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9题：

    单选题
    A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
    A

    low TBN value

    B

    high alkaline reserve

    C

    low flash point

    D

    high pour point


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Obviously, for a given fuel oil, its pour point is （） its cloud point.
    A

    lower than

    B

    higher than

    C

    as same as

    D

    better than


    正确答案： A
    解析： 暂无解析

  • 第11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12题：

    单选题
    The vapors given off by heated fuel oil are heavier than air and are（）.
    A

    odorless

    B

    explosive

    C

    nontoxic

    D

    visible


    正确答案： D
    解析： 暂无解析

  • 第13题：

    The flash point of a petroleum product is an indication of its ______.

    A.viscosity

    B.pour point

    C.volatility

    D.lower explosive limit


    正确答案：C

  • 第14题：

    The core(核心) item in the Oil Record Book Part I is______, and its main content is______.

    A.Item A, BALLAST OR CLEANING OF FUEL OIL TANKS

    B.Item B, DISCHARGE OF DIRTY BALLAST OR CLEANING WATER FROM FUEL OIL TANKS REFERRED TO UNDER SECTION(A)

    C.Item C, DISPOSAL OF OIL RESIDUES(SLUDGE)

    D.Item H, BUNKERING OF FUEL OIL


    正确答案：C

  • 第15题：

    单选题
    An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）
    A

    have a high viscosity index

    B

    mix readily with refrigerant

    C

    have a high freezing point

    D

    have a low pour point


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）
    A

    Lube oil is diluted and its viscosity is reduced

    B

    Sulfuric acid is formed

    C

    Bearings become pitted ad immediately fail

    D

    Valve stems develop sludge deposits


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Diesel engine lube oil diluted with fuel oil is indicated by（）
    A

    decreased viscosity

    B

    decreased pour point

    C

    increased flash point

    D

    increased viscosity


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Increasing the temperature of a fuel will reduce its （）.
    A

    viscosity

    B

    pressure

    C

    resistance

    D

    setting point


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    When air is at its dew point it is at its（）
    A

    lowest absolute humidity

    B

    lowest relative humidity

    C

    highest absolute humidity

    D

    highest relative humidity


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    The quality of the fuel oil and lube oil （）, Im afraid.
    A

    has much to do with the operation of the engine and its life

    B

    have much to do with the operation of the engine and its life

    C

    has much doing with the operation of the engine and its life

    D

    have much doing with the operation of the engine and its life


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should（）
    A

    remove the discharge ring

    B

    re-prime the purifier

    C

    the centrifuge to its proper speed

    D

    install an additional discharge ring


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.
    A

    quantity of fuel to be received

    B

    flash point of the fuel as it is received

    C

    fuel temperature as it is received

    D

    viscosity of the fuel being received


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of （）
    A

    refrigerant bubbles in the lube oil

    B

    refrigerant reducing the lube oil viscosity

    C

    oxidation of the lube oil from overheating

    D

    reducing the floc or cloud point of the oil


    正确答案： D
    解析： 暂无解析

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