One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish rin

题目

One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?

A.Low loading of the cylinder

B.Excessive cooling of that piston

C.Sluggish ring action on the piston

D.A mechanical defect in a working part

相似考题

1.Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.A.using fuel oil with low cetane numberB.a badly worn piston pinC.a loose flywheel keyD.a loose bed plate bolt

2.单选题Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?（）A Excessive cylinder linerB water in the fuel systemC Cracked cylinder linerD Leaking lube oil cooler

3.单选题In some diesel engine designs,（）the injection of cylinder oil is timed to impinge when the piston and only impinge on（）A is coming upward；cylinder ring beltB is going downward；piston ring beltC is coming upward；piston ring beltD is going downward；cylinder ring belt

4.How does combustion air enter the cylinder of a two-cycle diesel engine ? Through _______．A.Cylinder head valvesB.PortsC.Turbo chargersD.Bleeder valves

参考答案和解析
正确答案：D
更多“One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the ”相关问题

  • 第1题：

    单选题
    One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the （）
    A

    crankcase

    B

    piston

    C

    cylinder liner

    D

    crank cheek


    正确答案： B
    解析： 暂无解析

  • 第2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3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4题：

    单选题
    A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
    A

    a leaking fuel injection nozzle

    B

    a clogged air filter

    C

    early fuel injection

    D

    burned valves


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）
    A

    crankcase

    B

    cylinder head

    C

    valve cover

    D

    engine frame


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    In a diesel engine, when the fuel is injected into the cylinder,（）
    A

    the piston is just coming upward from the bottom dead center

    B

    the piston has moved about one-fifth of the way up

    C

    the piston has moved most of the way up and almost reached the TDC

    D

    the piston has just past the TDC


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）
    A

    low loading of that cylinder

    B

    faulty combustion in that cylinder

    C

    sluggish piston ring action

    D

    excessive piston cooling


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    How does combustion air enter the cylinder of a two-cycle diesel engine?（）
    A

    Cylinder head valves

    B

    Ports

    C

    Turbo chargers

    D

    Bleeder valves


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）
    A

    excessive cylinder lubrication

    B

    a lugging engine

    C

    a leaking cylinder liner

    D

    overloading of one cylinder


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）
    A

    increase scavenge air pressure

    B

    reduce fuel booster pump pressure

    C

    adjust the fuel rack

    D

    retard fuel injector timing


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    （）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.
    A

    A common rail engine；conventional engines

    B

    A conventional engine；common rail engines

    C

    A marine diesel engine；most other engines

    D

    A two-stroke engine；four-stroke engines


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    When fuel is injected in a diesel engine cylinder too early, （）
    A

    ignition may be delayed

    B

    fuel economy is not affected

    C

    exhaust gas temperature will be unchanged

    D

    the exhaust will be clear


    正确答案： D
    解析： 暂无解析

  • 第13题：

    单选题
    In a diesel engine, when refitting piston rings you should （） Ⅰ.check the ring gap at the smallest diameter of the cylinder Ⅱ. Remove carbon from the ring groove
    A

    Ⅰ only

    B

    Ⅱ only

    C

    both Ⅰ and Ⅱ

    D

    neither Ⅰ nor Ⅱ


    正确答案： D
    解析： 暂无解析

  • 第14题：

    单选题
    Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?（）
    A

    Lubrication to the defective cylinder should be increased

    B

    Cooling water temperature to the engine should be increased

    C

    Only the turbocharger speed should be reduced

    D

    Engine speed should be reduced


    正确答案： D
    解析： 暂无解析

  • 第15题：

    单选题
    When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）
    A

    overloading the engine

    B

    low exhaust valve lift

    C

    excessive cylinder cooling

    D

    insufficient mechanical clearance


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）
    A

    check the cylinder exhausts for black smoke

    B

    listen for combustion knock in that cylinder

    C

    isolate each cylinder and inspect the injector

    D

    check the cylinder exhaust temperature frequently


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    Trunk type diesel engine pistons are effectively cooled when heat is（）
    A

    radiated through the engine block

    B

    transferred to water cooled cylinder walls

    C

    conducted through the piston crown

    D

    transferred to escaping exhaust gases


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Broken intake valve springs on one cylinder of a diesel engine can cause the engine to （）
    A

    Over speed

    B

    fire improperly

    C

    lose oil pressure

    D

    overheatrapidly


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    Persistent knocking in one cylinder of a diesel engine could be caused by（）.
    A

    a low load on that cylinder

    B

    sluggish piston ring action

    C

    excessive piston crown cooling

    D

    excessive clearance of piston pin


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）
    A

    decrease in ignition lag

    B

    increase in fuel economy

    C

    reduction in lube oil viscosity

    D

    increase in cylinder misfiring


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A faulty injection in one cylinder of an operating diesel engine can be located by （）
    A

    cutting out individual injectors and noting engine performance

    B

    checking lube oil temperature

    C

    checking cam position

    D

    using a timing light


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    Which statement about diesel engine combustion is true?（）
    A

    Combustion does not begin until the piston starts down on the power stroke

    B

    Maximum combustion pressure is reached before TDC

    C

    Turbulence in the cylinder causes a delay in ignition

    D

    Maximum cylinder firing pressure is not developed until the piston passes TDC


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    One of function of diesel engine lubricating oil is to （）
    A

    induce carbon formation on cylinder walls

    B

    improve fuel penetration in the combustion space

    C

    form a friction reducing film between mating surfaces

    D

    lubricate the fuel injection


    正确答案： B
    解析： 暂无解析

相关内容