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.grea

题目

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

相似考题

1.Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? .A.Reduce engine speed to idle before removing the filterB.Soak the dirty filter in kerosene onlyC.Blow out the air inlet with compressed airD.Cover the air inlet after removing the filter

2.单选题A marine diesel engine is started by（）A supplying high pressure oil into a hydraulic motorB supplying high temperature air into the cylinderC supplying high pressure air into the cylinderD electrical igniting

3.单选题Poor combustion in a diesel engine can be caused by （）.A high compression pressureB low intake air temperatureC low exhaust pressureD high scavenge air pressure

4.During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.A.effective cylinder scavenging and coolingB.constant pressure from the turbochargersC.cooler operation of the exhaust systemD.effective constant pressure for turbocharger operation

更多“The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually ”相关问题

  • 第1题：

    单选题
    If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）
    A

    Intake manifold pressure will be high

    B

    Intake manifold pressure will be unaffected

    C

    Exhaust temperatures will be high

    D

    Exhaust temperatures will be low


    正确答案： C
    解析： 暂无解析

  • 第2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3题：

    单选题
    During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）
    A

    effective cylinder scavenging and cooling

    B

    constant pressure from the turbochargers

    C

    cooler operation of the exhaust system

    D

    effective constant pressure for turbocharger operation


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）
    A

    Faulty turbocharger turbine diffuser ring

    B

    Faulty turbocharger compressor ring

    C

    Insufficient cooling water flow

    D

    Clogged air intake filters


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    A naturally aspirated diesel engine at full throttle will have an intake manifold pressure （）
    A

    slightly less than atmospheric pressure

    B

    approximately equal to exhaust manifold pressure at all times

    C

    that is widely fluctuating constantly

    D

    decreasing as engine load increases


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）
    A

    An increased air temperature differential between the cooler inlet and outlet

    B

    A decrease in the air pressure differential across the cooler

    C

    Excessive condensate forming in the air box

    D

    A decrease in the air temperature differential between the cooler inlet and outlet


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）
    A

    Excessive piston blow-by to the manifold

    B

    Insufficient cooling water flow

    C

    Accumulated water in the air boxes

    D

    Clogged air intake filters


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    An operating turbocharged diesel engine that suddenly loses power, is due to a/an（）
    A

    restricted turbocharger air intake

    B

    oil leak into the turbocharger

    C

    dribbling injector

    D

    low fuel viscosity


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）
    A

    an obstruction in an cylinder

    B

    water accumulation in some engine cylinders

    C

    low starting air pressure

    D

    low scavenge air pressure


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.
    A

    decrease in maximum cylinder pressure

    B

    increase in ignition lag

    C

    decrease in fuel consumption per horsepower-hour

    D

    decrease in exhaust manifold pressure


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）
    A

    during the valve overlap period

    B

    with only the exhaust valve open

    C

    at a pressure below atmospheric

    D

    without cooling the cylinders or pistons


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    The timing of diesel engine air starting valves is controlled by（）
    A

    the air start valve timing gears and rods

    B

    a cylinder check valve

    C

    individual cams and valve gear

    D

    an air manifold poppet valve


    正确答案： D
    解析： 暂无解析

  • 第13题：

    单选题
    In a four-cycle diesel engine piston blow-by can result in increased（）
    A

    crankcase pressure

    B

    compression pressure

    C

    scavenge pressure

    D

    exhaust manifold pressure


    正确答案： A
    解析： 暂无解析

  • 第14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： A
    解析： 暂无解析

  • 第15题：

    单选题
    A turbocharged diesel engine will have an intake manifold pressure（）
    A

    constantly decreasing as engine load increase

    B

    constantly increasing as the amount of supercharging increases

    C

    approximately equal to exhaust manifold pressure at all times

    D

    approximately equal to atmospheric pressure at all times


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.
    A

    air bottle

    B

    air compressor

    C

    crank case

    D

    combustion chamber


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）
    A

    turbocharger will stall

    B

    density of the air charge will decrease

    C

    scavenge effect will increase

    D

    exhaust pressure will increase


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?（）
    A

    Reduce engine speed to idle before removing the filter

    B

    Soak the dirty filter in kerosene only

    C

    Blow out the air inlet with compressed air

    D

    Cover the air inlet after removing the filter


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    On what do you depend having the air cooler of main engine chemically washed?（）
    A

    increased air pressure differenced before and aft air cooler

    B

    reduced exhaust temperature in all cylinders

    C

    reduced temperature difference between water inlet and outlet

    D

    both A and C


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）
    A

    At zero load the intake manifold pressure is greater than the exhaust manifold pressure

    B

    At full load the intake manifold pressure and exhaust manifold pressure are equal

    C

    At full load the intake manifold pressure is less than the exhaust manifold pressure

    D

    At full load the intake manifold pressure is greater than the exhaust manifold pressure


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）
    A

    lag behind the increased fuel supplied to the engine

    B

    enter the engine along with the increase in the fuel

    C

    enter the engine before the increased fuel supply

    D

    leave the turbocharger as a negative pulse


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    A turbocharged, four-stroke/cycle diesel engine has a larger valve overlap than a naturally aspirated four-stroke/cycle diesel engine, in order to in crease the （）.
    A

    temperature of the exhaust gases

    B

    energy supplied to the turbocharger

    C

    air pressure to the intake manifold

    D

    purge of exhausted gases from the cylinders


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    The highest pressure in a diesel engine cylinder normally occurs （）.
    A

    at TDC

    B

    before TDC

    C

    after TDC

    D

    during air starting


    正确答案： A
    解析： 暂无解析

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