In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.A.low firing pressureB.low exhaust temperatureC.mechanical knock in each cylinderD.fuel knock in each cylinder

题目

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.

A.low firing pressure

B.low exhaust temperature

C.mechanical knock in each cylinder

D.fuel knock in each cylinder

相似考题

1.A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.A.engine overloadB.leaky valvesC.stuck or broken piston ringsD.low air injection pressure

2.A smoking exhaust from an operating diesel engine could be caused by( ).A.low sulfur content in the fuelB.a loose injector inlet connectionC.late fuel injectionD.high injection pressure

3.One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the_______.A.governor sensitivityB.exhaust temperatureC.fuel injection pressureD.speed of the cam shaft

4.High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).A.decreased piston to cylinder head clearanceB.increased exhaust system back pressureC.early fuel injection timingD.low scavenge air temperature

更多“In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with _ ”相关问题

  • 第1题：

    When fuel is injected late into a diesel engine cylinder_______.

    A.the exhaust will be clear

    B.fuel consumption will be low

    C.all the fuel will be burned at top dead center

    D.fuel consumption will be high


    正确答案：D

  • 第2题：

    Sudden unloading of a diesel engine can cause ______．

    A.Decreased fuel efficiency

    B.Increased exhaust temperature

    C.Black smoke

    D.Overspeed trip


    正确答案：D

  • 第3题：

    单选题
    Black smoke exhausting from a diesel engine indicates（）
    A

    proper fuel injection

    B

    water in the fuel

    C

    incomplete combustion

    D

    burning of lube oil


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
    A

    corrosion and grooving of exhaust valves

    B

    corrosion and gumming of the fuel injection pump

    C

    salt deposits in the exhaust manifold

    D

    slag deposits in the fuel injection equipment


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）
    A

    feel the high pressure fuel line

    B

    check the cylinder exhausts for white smoke frequently

    C

    check the cylinder exhaust temperature

    D

    isolate each cylinder and inspect the injector


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    Black smoke exhausting from an operating diesel engine can be caused by （）
    A

    fuel dribbling from leaking fuel injectors

    B

    burning fuel with a high carbon content

    C

    burning fuel with a high vanadium content

    D

    burning fuel with a lower sulphur content


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    Late fuel oil injection in a diesel engine can result in （）
    A

    fuel knock

    B

    increased power

    C

    low compression pressure

    D

    high exhaust temperature


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.
    A

    engine overload

    B

    low combustion temperature

    C

    plugged fuel nozzle holes

    D

    excessive compression pressure


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with（）
    A

    low firing pressure

    B

    low exhaust temperature

    C

    mechanical knock in each cylinder

    D

    fuel knock in each cylinder


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    If a diesel engine is smoking excessively under load, the cause could be （）
    A

    low exhaust back pressure

    B

    early fuel injection in one of the cylinders

    C

    compression pressure in one of the cylinders

    D

    plugged injector holes


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
    A

    early injection timing

    B

    worn orifices in the injection nozzles

    C

    worn or scored cylinder liners

    D

    using a fuel with too low of a cetane number


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    Late fuel injection in a diesel engine is indicated by low firing pressure with （）
    A

    low exhaust temperature

    B

    low exhaust pressure

    C

    mechanical knock in each cylinder

    D

    black or gray exhaust smoke


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Engine operating conditions may be indicated by the color of the exhaust smoke Black smoke could indicate .

    A.an insufficient speed droop setting

    B.an overloaded engine

    C.clogged drain holes in the oil control rings

    D.complete combustion


    正确答案：B

  • 第14题：

    What would white exhaust smoke from a diesel engine probably mean ________．

    A.Late fuel injection

    B.Excess combustion air

    C.Dribbling injector tips

    D.Excessive lube oil consumption


    正确答案：A

  • 第15题：

    单选题
    A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
    A

    engine overload

    B

    leaky valves

    C

    stuck or broken piston rings

    D

    low air injection pressure


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    Late fuel injection timing is indicated by （）
    A

    lower than normal cylinder pressure and low exhaust temperature

    B

    lower than normal cylinder pressure and high exhaust temperature

    C

    higher than normal cylinder pressure and low exhaust temperature

    D

    higher than normal cylinder pressure and high exhaust temperature


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）
    A

    an insufficient speed droop setting

    B

    an overloaded engine

    C

    clogged drain holes in the oil control rings

    D

    complete combustion


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    When fuel is injected late into a diesel engine cylinder,（）.
    A

    the exhaust will be clear

    B

    fuel consumption will be low

    C

    all the fuel will be burned at top dead center

    D

    fuel consumption will be high


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    A smoking exhaust from an operating diesel engine could be caused by （）
    A

    low sulfur content in the fuel

    B

    a loose injector inlet connection

    C

    late fuel injection

    D

    high injection pressure


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    High firing pressures and a low exhaust temperature in a diesel engine may result from （）.
    A

    decreased piston to cylinder head clearance

    B

    increased exhaust system back pressure

    C

    early fuel injection timing

    D

    low scavenge air temperature


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）
    A

    excessive fuel pressure

    B

    high lube oil viscosity

    C

    inadequate fuel injection

    D

    excessive starting air pressure


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Late fuel injection in a diesel engine is indicated by low firing pressure with（）
    A

    high exhaust temperature

    B

    low exhaust temperature

    C

    fuel knock in each cylinder

    D

    mechanical knock in each cylinder


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）
    A

    low exhaust temperature

    B

    low firing pressure

    C

    fuel knock in each cylinder

    D

    mechanical knock in each cylinder


    正确答案： C
    解析： 暂无解析

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