The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease

题目

The separation of impurities and water from ______is essential for good combustion of diesel engines.

A.lube oil

B.fuel oil

C.turbine oil

D.grease

相似考题

1.Which of the following is true?A.The water in Texas have been reduced by 75%.B.Most industries in the world suffer from water shortagers.C.The underground water in Saudi Arabia might run out in 50 years.D.Good management of water use resulted from the project in the Central Valley.

2.When a clarifier is running the impurities and water collect at the bowl _____.A.centerB.peripheryC.inletD.upper parts

3.______ is not likely to be a methods of Traffic Separation．A.Separation of opposing streams of traffic by separation zones or linesB.The separation of through traffic from local traffic by provision of inshore traffic zonesC.Division of traffic from several different direction into sectorsD.Control of routing traffic through shipping routes

4.Theoretical perfect combustion in a diesel engine yields by-products of_____.A.aldehydes and carbon dioxideB.water vapor and carbon monoxideC.nitrogen and carbon monoxideD.water vapor and carbon dioxide

参考答案和解析
正确答案：B
更多“The separation of impurities and water from ______is essential for good combustion of dies ”相关问题

  • 第1题：

    Good anchorage may be obtained anywhere，generally mud and sand，in this water area Vessel may have______．

    A.good dragging ground

    B.good towing ground

    C.good holding ground

    D.good grabbing ground


    正确答案：C
    在这片水域好的锚地可以在任何地方找到，一般是泥沙底，船舶有好的抓力。

  • 第2题：

    The drinking water is contaminated with impurities.

    A:blackened
    B:polluted
    C:darkened
    D:mixed

    答案：B
    解析：
    本句意思：饮用水被杂质污染了。contaminate意为“弄脏，污染”，与pollute（污染）意思相近。blacken使变黑；darken使变暗；mix混合。

  • 第3题：

    单选题
    A high rate of separation between oil and water is favored by （）.
    A

    large size of oil globule

    B

    low temperature

    C

    high viscosity

    D

    high flow rate


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    Which statement concerning the collection of fresh water is FALSE?（）
    A

    Fresh water may be obtained from fish

    B

    lifeboat covers or canopies should be washed with rain before drinking water is collected

    C

    Fresh water may be collected from condensation inside the life-raft

    D

    Freshwater cannot be produced from standing seawater


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.
    A

    contaminating water

    B

    contaminated additives

    C

    contaminated fuel

    D

    contaminating impurities


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.
    A

    bottom

    B

    top

    C

    center

    D

    periphery


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.
    A

    an oily water separator

    B

    a purifier

    C

    a centrifugal compressor

    D

    a clarifier


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    （） is not likely to be a methods of Traffic Separation.
    A

    Separation of opposing streams of traffic by separation zones or lines

    B

    The separation of through traffic from local traffic by provision of inshore traffic zones

    C

    Division of traffic from several different direction into sectors

    D

    Control of routing traffic through shipping routes


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Impurities from the boiler water surface can be removed through the （）.
    A

    safety valve

    B

    blow down valve

    C

    scum valve

    D

    feed check valve


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Bottom blow valves are installed on auxiliary water-tube boilers to （）
    A

    completely drain the boiler in an emergency

    B

    prevent sludge from forming in the drum

    C

    remove floating impurities from the boiler water surface

    D

    remove settled solids from the water drum


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air（）
    A

    high temperatures

    B

    low temperatures

    C

    wet

    D

    dirty


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    The expression “separate the wheat from the chaff in the teaching profession” is closest in meaning to ______.
    A

    distinguish better teachers from less capable ones

    B

    differentiate young teachers from old ones

    C

    tell the essential qualities of good teaching

    D

    reevaluate the role of senior teachers


    正确答案： A
    解析：
    题干引用部分出现在第八段首句。文章中讲述了美国中小学教师招聘和工资发放以工作年限和学历为基础导致优秀教师流失，而水平一般的教师留了下来，此处separate the wheat from the chaff取其比喻义，chaff原义为“糠；谷壳”，文中形容把学校里的优秀教师和能力较差的教师进行明确区分。因此选项A正确。

  • 第13题：

    Carl Sagan believes that Venus might be colonized from earth because__________.

    A.it might be possible to change its atmosphere
    B.its atmosphere is the same as the earth's
    C.there is a good supply of water on Venus
    D.the days on Venus are long enough

    答案：A
    解析：
    此题考查因果关系。由第二段第一句中的“it will be possible to change the atmosphere ofVenus and so create a new world”可知，so是表示因果的连接词，前因后果，所以正确答案为A。

  • 第14题：

    单选题
    A shallow dish positioned at the normal water level is connected to the（）This enables the blowing down or removal of scum and impurities from the water surface.
    A

    main stern stop valve

    B

    auxiliary steam stop valve

    C

    scum valve

    D

    blow down valve


    正确答案： B
    解析： 暂无解析

  • 第15题：

    单选题
    What is NOT a function of the steam drum of a marine water-tube boiler（）.
    A

    Receives saturated steam from the generating tubes

    B

    Serves as a reservoir of boiler feed water

    C

    Holds internal fittings for separation of moisture from steam

    D

    Collects steam exhausted from the turbines


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    Bottom blow valves are installed on auxiliary water-tube boilers to （）
    A

    remove suspended and precipitated solids from the boiler water

    B

    completely drain the boiler in an emergency situation

    C

    prevent hardened scale deposits in the water drum

    D

    remove floating impurities from the oily water surface


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    The emulsion of the oil is mainly caused by （）.
    A

    the solid impurities of large particle

    B

    the solid impurities of fine particle

    C

    the water content

    D

    both water and solid impurities


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    The separation of impurities and water from （） is essential for good combustion of diesel engines.
    A

    lube oil

    B

    fuel oil

    C

    turbine oil

    D

    grease


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    The principle of separation by which all commercially available oily water separators function is （） differential between oil and water.
    A

    the temperature

    B

    the viscosity

    C

    the gravity

    D

    the size


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    When a clarifier is running the impurities and water collect at the bowl （）.
    A

    center

    B

    periphery

    C

    inlet

    D

    upper parts


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.
    A

    defrosting

    B

    de-oiling

    C

    demulsifying

    D

    dehumidifying


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）
    A

    increase blow-by in all cylinders

    B

    incomplete combustion in all cylinder

    C

    overloading in all cylinders

    D

    insufficient fuel delivery to all cylinders


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    A vessel using a traffic separation scheme shall so far as practicable（）a traffic separation line or separation zone.
    A

    keep well clear

    B

    keep very far

    C

    keep clear of

    D

    keep clear from


    正确答案： C
    解析： 暂无解析

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