单选题Water accumulating in the crankcase of a diesel engine could indicate（）A a cracked cylinder linerB excessive water in the fuelC a leaking intercoolerD excessive moisture in the scavenge air

题目
单选题
Water accumulating in the crankcase of a diesel engine could indicate（）
A

a cracked cylinder liner

B

excessive water in the fuel

C

a leaking intercooler

D

excessive moisture in the scavenge air

相似考题

1.Low compression in a diesel engine could be caused byA.worn or broken cylinder liner sealing ringsB.high cooling water temperatureC.worn or broken piston ringsD.low fuel oil pressure

2.Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?A.Leaking seal ringB.Insufficient heat transfer from the exhaust valvesC.Blocked cooling water passages to the headD.Excessive scavenging air provided to the engine

3.If a diesel engine turned over freely but failed to start, the cause could be ________.A.water in the fuelB.cold lube oilC.excessive starting air pressureD.excessive fuel pressure

4.A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/anA.turbocharger malfunction or failureB.crankcase exhauster overloadC.overload on the intercoolerD.obstruction in the engine cylinders

更多“Water accumulating in the crankcase of a diesel engine could”相关问题

  • 第1题：

    单选题
    If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
    A

    stop the engine immediately to prevent damage

    B

    increase lube oil pressure

    C

    slow the engine allowing it to gradually cool

    D

    decrease the cooling water it temperature to the water jacket


    正确答案： A
    解析： 暂无解析

  • 第2题：

    单选题
    Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）
    A

    increasing the quantity of starting air

    B

    increasing the lube oil pressure

    C

    heating the engine fuel supply

    D

    heating the engine jacket water


    正确答案： A
    解析： 暂无解析

  • 第3题：

    单选题
    Due to excessive water in the fuel, a diesel engine fails to startBefore the engine can be started, the water must be removed from the （）.
    A

    fuel pumps

    B

    cylinders

    C

    fuel strainers

    D

    all of above


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）
    A

    The cylinder indicator cocks should be opened

    B

    The sump lube oil scavenge pump should be secured immediately

    C

    The explosion relief valves should be manually opened

    D

    The crankcase should remain unopened until the engine has cooled


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）
    A

    free entry of air to the crankcase

    B

    water entering the crankcase while engine wash-downs are being performed

    C

    excessive oil leakage during periods of increased blow-by

    D

    sub-cooling internal components


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring（）
    A

    back clearance

    B

    side clearance

    C

    gap clearance

    D

    taper clearance


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    Low compression in a diesel engine could be caused by（）
    A

    worn or broken cylinder liner sealing rings

    B

    high cooling water temperature

    C

    worn or broken piston rings

    D

    low fuel oil pressure


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    If water is found in the crankcase of a diesel engine, the cause may be due to（）
    A

    a cracked cylinder head

    B

    a leaky cylinder head gasket

    C

    a cracked cylinder liner

    D

    any of the above


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    A diesel engine crankcase ventilation system （）
    A

    prevents spark generation

    B

    removes combustible gases

    C

    determines the level of combustible gases

    D

    provides inert gas generation in crankcase


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST （）
    A

    place standby cooler in operation

    B

    reduce engine load

    C

    check thermostatic valve

    D

    clean sea water strainer


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    How dose water enter the crankcase of a diesel engine?（）
    A

    Through the crankcase exhauster

    B

    As water vapor contained in blow-by

    C

    Demulsifying lube oil passing through the main bearings

    D

    Condensation from vapor formed in the expansion tank


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）
    A

    Open the crankcase immediately to check for damage

    B

    Apply fire fighting water through the crankcase breather

    C

    Allow the engine to cool before opening the crankcase

    D

    Assume that there is no damage to the crankshaft


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Lube oil accumulating in the cooling water system of a diesel engine will result in （）
    A

    lube cooler failure

    B

    poor heat transfer

    C

    mechanical lubricator failure

    D

    camshaft seizure


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.
    A

    excessive crankcase pressure

    B

    excessive lube oil temperature

    C

    contamination of the lube oil by water

    D

    contamination of the cooling water by lube oil


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    Why the cooling water of the diesel engine should be treated? Because the（）
    A

    Cooling water is alkalescence

    B

    cooling water is acidity

    C

    cooling water has salinity

    D

    cooling water has impurity


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
    A

    Leaking seal ring

    B

    Insufficient heat transfer from the exhaust valves

    C

    Block cooling water passages to the head

    D

    Excessive scavenging air provided to the engine


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.
    A

    reduce water temperature

    B

    reduce water turbulence

    C

    provide an air cushion

    D

    allow for an increase in water volume as the engine warms up


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    In a diesel engine, blow-by（）
    A

    increase exhaust back pressure

    B

    causes excessive crankcase pressure

    C

    can only be detected by a compression check

    D

    decreases fuel consumption


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）
    A

    raw water pump discharge

    B

    expansion tank outlet

    C

    cooling water heat exchanger

    D

    outlet engine jacket water outlet


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）
    A

    immediately open all crankcase relief ports

    B

    increase crankcase exhauster speed to draw cool air into the engine

    C

    allow the engine to cool naturally

    D

    increase crank case scavenge air to remove unburned gases


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.
    A

    the engine was over filled

    B

    there might be a fuel leak

    C

    there might be a water leak

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
    A

    low oil pressure

    B

    high coolant pressure

    C

    leaking fuel injector

    D

    cracked cylinder head or liner


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
    A

    metal particles loosened by wear

    B

    air when no air cleaners are used

    C

    condensation of water vapors

    D

    breakdown of the lubricating oil by dilution


    正确答案： B
    解析： 暂无解析

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