单选题The lube oil in the bearings is drawn from a （）, usually located in the bedplate.A tankB sumpC vesselD bottle

题目
单选题
The lube oil in the bearings is drawn from a （）, usually located in the bedplate.
A

tank

B

sump

C

vessel

D

bottle

相似考题

1.Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.A.The direction of pressure on the journal in four-stroke engine is continuouslyB.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engineC.four-stroke engines usually utilize a heavier grade of oil than tow-stroke enginesD.Low-stroke engines usually consume less lube oil than four-stroke engines

2.Lubrication for the main reduction gears used with diesel engines is usually supplied byA.oil from the main engine sumpB.an independent lube oil systemC.the stern bearing head tankD.the stem bearing sump tank

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.Oil oxidation as a result of excessively high lube oil temperature, is harmful to a diesel engine BecauseA.oil foaming will always occurB.large quantities of oil are consumedC.lube oil viscosity is always decreasedD.corrosive by-products are usually formed

更多“The lube oil in the bearings is drawn from a （）, usually loc”相关问题

  • 第1题：

    单选题
    Worn main bearings in a diesel engine can result in （）
    A

    decreased compression pressure

    B

    increased lube oil pressure

    C

    lower lube oil temperature

    D

    excessive leakage past the piston rings


    正确答案： D
    解析： 暂无解析

  • 第2题：

    单选题
    During check on top clearance in main bearings, turn the crankthrow for the relevant cylinder unit to （） and stop the lube oil circulating pump.
    A

    port side

    B

    starboard side

    C

    BDC position

    D

    DC position


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.
    A

    lube oil pump suction line

    B

    lube oil pump discharge line

    C

    bottom of the lube oil sump

    D

    outlet from the lube oil header


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because（）.
    A

    The direction of pressure on the journal in four-stroke engine is continuously

    B

    positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine

    C

    four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines

    D

    Low-stroke engines usually consume less lube oil than four-stroke engines


    正确答案： B
    解析： 暂无解析

  • 第5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6题：

    单选题
    Lube oil pumps taking suction from the sump of most small marine engines are usually （）.
    A

    of the diaphragm type

    B

    of the centrifugal type

    C

    of the positive displacement type

    D

    independently driven by electric motors


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    Demulsibility of a lube oil is defined as （）.
    A

    the ability of oil to separate from water

    B

    the temperature at which oil flows rapidly

    C

    a measure of the water in a lube oil system

    D

    an emulsion of different grades of oil


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.
    A

    a gravity tank

    B

    a sump

    C

    a vessel

    D

    a bottle


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Lube oil in the fresh water cooling system of a diesel engine may result from a （）
    A

    camshaft seizure

    B

    lube oil pump failure

    C

    lube oil cooler failure

    D

    lube oil pump overflow


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    When separating the lube oil without additive, it is usually cleaned with hot water; the aim is to remove （） from it.
    A

    acid

    B

    sludge

    C

    mechanical impurity

    D

    salinity


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    Waste oil from the lube oil sumps of machinery may NOT be （）.
    A

    drained into the vessels bilges

    B

    reclaimed for other uses

    C

    held in a slop tank

    D

    purified and then reused


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Oil oxidation, as a result of excessively high lube oil temperature, is harmful to a diesel engine because （）
    A

    oil foaming will occur

    B

    large quantities of oil are consumed

    C

    lube oil viscosity is always decreased

    D

    corrosive by-products are usually formed


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine （）
    A

    camshaft beatings

    B

    main bearings

    C

    piston crowns

    D

    cylinder walls


    正确答案： D
    解析： 暂无解析

  • 第14题：

    单选题
    A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.
    A

    acid

    B

    fuel oil

    C

    sediment

    D

    water


    正确答案： B
    解析： 暂无解析

  • 第15题：

    单选题
    You are inspecting the lower main precision bearings on a diesel engine.You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by （）
    A

    large dirt particles in the oil supply

    B

    insufficient lubricating oil and overheating

    C

    normal wear

    D

    water contamination of the lube oil


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）
    A

    loss of additives from the lube oil

    B

    carbon deposits in the lube oil

    C

    excessive centrifuging

    D

    excessive fuel dilution


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）
    A

    water contamination

    B

    mixing oils of two widely different viscosities

    C

    overheating

    D

    aeration


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl?（）
    A

    Contamination of the lube oil by emulsification will result

    B

    The lube oil will not be subjected to the proper centrifugal force

    C

    The lube oil will overheat and flash

    D

    Oil will discharge from the heavy phase discharge port and be wasted


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    Setting a sealing equipment astern on the tailshaft can’t （）
    A

    prevent the seawater from intergrating

    B

    prevent the lube oil from running out of the outside aboard

    C

    strengthen the intencity of the sterntube

    D

    prevent the mud and sand from entering the lube oil system


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The oil in a cargo winch gear box should be sampled periodically to （）.
    A

    prevent the gear box from leaking

    B

    prevent the oil from becoming inflammable

    C

    make sure it has not become contaminated

    D

    make sure the motor bearings are lubricated


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    Sludge formation in a diesel engine lube oil system is caused by（）
    A

    carbonization of oils from the combustion chambers

    B

    emulsions of lube oil and water

    C

    coagulation of unburned fuel below the piston rings

    D

    all of the above


    正确答案： D
    解析： 暂无解析

  • 第22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

  • 第23题：

    单选题
    Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）
    A

    Splash

    B

    Gravity

    C

    Pressure

    D

    Bypass


    正确答案： C
    解析： 暂无解析

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