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单选题In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）A injection lagB ignition delayC compressionD turbulence lag

题目
单选题
In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）
A

injection lag

B

ignition delay

C

compression

D

turbulence lag

相似考题

1.Generally speaking, the fuel injected into a marine diesel engine combustion chamber is ignited by ______.A.spark plugsB.glow plugsC.heat of compressionD.a magneto

2.单选题As a heat engine,（） energy is the source of power by which the diesel engine can be operated.A electricB heatC mechanicalD exhaust

3.单选题In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）A the burning of the fuel； medium shaftB fuel spray； fresh airC fuel； fuel sprayD the burning of the fuel； the burned gas mixture

4.单选题Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?（）A To prevent internal damage form local overheatingB To ensure the fuel nozzles are flushed cleanC To clear the smoke stackD To let the waste heat boiler reduce its rate of steam generation

更多“In a diesel engine, the time taken to heat the fuel particle”相关问题

  • 第1题：

    单选题
    The air supplied to a diesel engine is compressed to （） (1) provide heat for the ignition of the fuel (2) decrease injection delay
    A

    (1) only is correct

    B

    (2) only is correct

    C

    both (1) and (2) are correct

    D

    neither (1) or (2) are correct


    正确答案： A
    解析： 暂无解析

  • 第2题：

    单选题
    Problems with the diesel engine fuel injection pump are usually caused by（）
    A

    improper adjustment

    B

    contaminated fuel

    C

    kinked fuel lines

    D

    excessive engine vibration


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）
    A

    Increase the cooling water flow to the engine

    B

    Secure or reduce fuel to that cylinder

    C

    Screw down on the pressure adjusting spring to decrease to decrease popping pressure

    D

    Readjust the injection timing


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will 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 coolant


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?（）
    A

    increased carbon buildup

    B

    burning of intake valves

    C

    excessive firing pressures

    D

    increased fuel consumption


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    What is one effect of running a diesel engine at too cool a temperature? （）
    A

    Buildup of sludge in the lubricating system

    B

    Excessive fuel consumption

    C

    Severe heat stresses on mechanical parts

    D

    Foaming of the lubricating oil


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    A change in the quality of fuel atomization by a diesel engine fuel injector would be caused by a/an （）
    A

    increase in engine speed

    B

    increase in cylinder turbulence

    C

    leaking needle valve

    D

    reduction in cylinder turbulence


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
    A

    Spark plug

    B

    Heat of compression

    C

    Carburetor

    D

    Glow plug


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Fuel injected into a diesel engines cylinder is ignited by （）.
    A

    the heat compressed fuel/air mixture in the cylinder

    B

    the fuel igniter

    C

    the fuel injector

    D

    the fuel pump


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    The most common diesel engine fuel system problems are caused by （）.
    A

    incorrect adjustments

    B

    dirty fuel

    C

    broken fuel lines

    D

    excessive vibration


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
    A

    as much fuel as

    B

    less fuel than

    C

    less fuel as

    D

    more fuel than


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）
    A

    ignition lag

    B

    engine horsepower

    C

    lube oil system pressure

    D

    specific fuel consumption


    正确答案： D
    解析： 暂无解析

  • 第13题：

    单选题
    In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）
    A

    injection lag

    B

    ignition delay

    C

    compression

    D

    turbulence lag


    正确答案： C
    解析： 暂无解析

  • 第14题：

    单选题
    The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to （）
    A

    prevent engine back pressure at heavy loads

    B

    increase total engine efficiency at low loads

    C

    prevent boiler corrosion at low engine loads

    D

    improve engine fuel consumption at any load


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in （）
    A

    increased horsepower

    B

    reduced efficiency

    C

    increased heat loss

    D

    lower cylinder pressures


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    To successfully reduce an excessively high diesel engine exhaust gas temperature, you should （）.
    A

    reduce the engine driven fuel pump outlet pressure

    B

    retard the fuel injector timing to reduce power

    C

    increase the fuel rack setting

    D

    reduce the load on the engine


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    Fuel is ignited in a diesel engine cylinder by （）
    A

    a spark plug

    B

    injectors

    C

    the heat of compression

    D

    increasing jacket water temperatures


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    Significant retardation of a diesel engine fuel injection timing will result in （）
    A

    smoother engine operation

    B

    advanced fuel ignition

    C

    increased fuel economy

    D

    reduced engine power


    正确答案： C
    解析： 暂无解析

  • 第19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20题：

    单选题
    Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）
    A

    increase engine power

    B

    increase engine load

    C

    decrease engine power

    D

    improve fuel economy


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）
    A

    increase the starting air pressure

    B

    use a higher than normal cranking speed

    C

    increase the fuel injection pressure

    D

    use a fuel having a lower ignition temperature


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    Turbulence in a diesel engine cylinder is of major importance in providing （）.
    A

    proper fuel metering

    B

    complete fuel/air mixing

    C

    minimal fuel penetration

    D

    proper fuel timing


    正确答案： C
    解析： 暂无解析

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