The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.A.inlet nozzle ringB.turbine wheel bladeC.diffuser passagesD.inlet volute

题目

The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.

A.inlet nozzle ring

B.turbine wheel blade

C.diffuser passages

D.inlet volute

相似考题

1.A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.A.increasing the linear velocity of the exhaust gasesB.changing directions of exhaust gas flowC.decreasing the temperature of the exhaust gasesD.accelerating the exhaust gas through a reduced size orifice

2.The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually______.A.greater than the average exhaust manifold pressureB.less than the average exhaust manifold pressureC.greater at the turbine wheel than at the impellerD.greater at reduced engine speed

3.Which method is used to supply inert gas from a flue gas system to the cargo tanks?A.Exhaust gas pressure from the stackB.High capacity fanC.Inert gas compressorD.Natural aspiration

4.The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A.large conical springsB.compressed air pressureC.hydraulic pressureD.exhaust gas pressure

更多“The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.A.inlet nozzle ringB.turbine wheel bladeC.diffuser passagesD.inlet volute”相关问题

  • 第1题：

    单选题
    When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）
    A

    Advanced ignition

    B

    Clogged air intake

    C

    Leaky exhaust valve

    D

    High exhaust pressure


    正确答案： C
    解析： 暂无解析

  • 第2题：

    单选题
    The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）
    A

    greater than the average exhaust manifold pressure

    B

    less than the average exhaust manifold pressure

    C

    greater at the turbine wheel than at the impeller

    D

    greater at reduced engine speed


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    In a turbocharger, inlet air velocity is increased in the（）.
    A

    inlet nozzle ring

    B

    stationary diffuser passages

    C

    compressor outlet volute

    D

    rotating impeller vanes


    正确答案： D
    解析： 暂无解析

  • 第4题：

    单选题
    When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
    A

    During operation at low speed

    B

    During operation at rated speed, but low power output

    C

    During acceleration

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第5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： C
    解析： 暂无解析

  • 第6题：

    单选题
    The expansion valve on a Freon system controls the （）.
    A

    superheat of the gas leaving the compressor

    B

    back pressure in the evaporator

    C

    temperature of the icebox

    D

    superheat of the gas leaving the evaporator


    正确答案： D
    解析： 暂无解析

  • 第7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8题：

    单选题
    The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
    A

    Low compression pressure and high exhaust temperature

    B

    Low firing pressure and high exhaust temperature

    C

    Low compression pressure and low exhaust temperature

    D

    Low firing pressure and low exhaust temperature


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    An indication of a diesel engine air intake being partially clogged, is （）.
    A

    low firing pressure and low exhaust temperatures

    B

    low firing pressure and normal exhaust temperatures

    C

    high firing pressure and low exhaust temperatures

    D

    high firing pressure and high exhaust temperatures


    正确答案： D
    解析： 暂无解析

  • 第10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： D
    解析： 暂无解析

  • 第11题：

    单选题
    An un-loader is installed on an air compressor to （）.
    A

    bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service

    B

    prevent excessive inter-stage pressure buildup

    C

    control compressor discharge pressure

    D

    remove all but the frictional load during starting


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
    A

    changing the direction of exhaust gas flow

    B

    increasing the exhaust gas velocity

    C

    changing the exhaust gas weight

    D

    increasing the exhaust gas static pressure


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Fins are installed on the generating tube surfaces in waste heat boilers to （）.
    A

    prevent soot fires in the exhaust system

    B

    prevent exhaust gas erosion of the tubes

    C

    increase the velocity of exhaust gas flow

    D

    increase the rate of heat transfer


    正确答案： D
    解析： 暂无解析

  • 第14题：

    单选题
    The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by （）.
    A

    large conical springs

    B

    compressed air pressure

    C

    hydraulic pressure

    D

    exhaust gas pressure


    正确答案： B
    解析： 暂无解析

  • 第15题：

    单选题
    Which of the following statements is not true concerning symptom of a fire in the scavenge air box?（）
    A

    an increase in the exhaust temperature of the affected cylinder

    B

    the turbocharger may surge

    C

    the explosion pressure in all cylinders will rise violently

    D

    smoke from the turbocharger air inlet filter will be seen


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    Which of the following conditions may be attributed to a fouled turbocharger compressor inlet screen or filter?（）
    A

    Decreasing scavenge air pressure

    B

    Increasing exhaust temperatures before the turbine

    C

    Reduction in engine speed

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    A non-return valve in the air delivery line near to the compressor must be （）type similar to the compressor discharge valve.
    A

    the low inertia

    B

    the high inertia

    C

    the low velocity

    D

    the high velocity


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    A knocking sound from one cylinder of an operating air compressor indicates （）.
    A

    a defective or broken high pressure un-loader

    B

    a loose valve plate

    C

    excessive overload

    D

    no compression


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    “This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）
    A

    a modern diesel engine；a turbine wheel

    B

    a modem diesel engine；exhaust gases

    C

    a compressor；an exhaust gas turbocharger

    D

    a compressor；a turbine wheel


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the （）
    A

    inlet nozzle ring

    B

    turbine wheel blade

    C

    diffuser passages

    D

    inlet vol


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A dry-type spark arrestor removes sparks from a diesel engine exhaust by（）
    A

    increasing the linear velocity of the exhaust gases

    B

    changing directions of exhaust gas flow

    C

    decreasing the temperature of the exhaust gases

    D

    accelerating the exhaust gas through a reduced size orifice


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Diesel engine mufflers or silencers reduce the engine exhaust noise by （）
    A

    passing the exhaust through long head pipes

    B

    diffusing exhaust vibrations through activated carbon baffles

    C

    increasing the exhaust gas velocity

    D

    reducing the exhaust gas velocity


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Why will a turbocharger diesel engine produce black smoke if excessive additional load is applied too quickly?（）
    A

    Exhaust energy would draw excess air

    B

    The inertia of the turbocharger rotor causes a time lag which delays the turbocharger speed increase

    C

    Exhaust gas pumping losses are increased due to turbine windage

    D

    Exhaust gas back pressure falls slightly due to increased nozzle action


    正确答案： C
    解析： 暂无解析

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