单选题One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）A reduce lube oil temperatureB raise exhaust temperature reduceC excessive heating of engine roomD reduce load on cooling water pump

题目
单选题
One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）
A

reduce lube oil temperature

B

raise exhaust temperature reduce

C

excessive heating of engine room

D

reduce load on cooling water pump

相似考题

1.A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).A.reduce heat radiation to the engine roomB.aid in preventing turbocharger overheatingC.condense and drain moisture from exhaust gasesD.dampen exhaust gas pulsations in the manifold

2.The purpose of treating the cooling water of the diesel engine is to____. I、 resist the scale formation in the cooling chamber II、 lubricate the engine part III、 increase thermal capacity IV、 resist corrosionA.I +IIB.II + IIIC.III + IVD.I +IV

3.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

4.The purpose of treating the cooling water of the diesel engine is to______. I、 resist the scale formation in the cooling chamber II、lubricate the engine part II III、increase thermal capacity IV、 resist corrosionA.I + IIB.II + IIIC.III + IVD.I + IV

参考答案和解析
正确答案： C
解析： 暂无解析
更多“One of the purposes for water cooling the exhaust manifold i”相关问题

  • 第1题：

    单选题
    If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
    A

    stop the engine immediately to prevent damage

    B

    increase lube oil pressure

    C

    slow the engine allowing it to gradually cool

    D

    decrease the cooling water it temperature to the water jacket


    正确答案： A
    解析： 暂无解析

  • 第2题：

    单选题
    In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?（）
    A

    An open vent in the cooling system

    B

    A fouled sea chest

    C

    A restricted water passage in the engine

    D

    Air entrained in the cooling water


    正确答案： D
    解析： 暂无解析

  • 第3题：

    单选题
    One characteristic of a pulse type turbo-charging system is（）
    A

    high average exhaust manifold

    B

    greatly fluctuating inlet manifold pressure

    C

    constant exhaust manifold pressure

    D

    multiple exhaust pipes to the turbocharger


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
    A

    the temperature and flow quantity of the exhaust gas from M.E

    B

    the quantity of steam demanded

    C

    the rotary speed and the cooling water temperature of main engine

    D

    efficiency of M.E turbocharger


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
    A

    Leaking seal ring

    B

    Insufficient heat transfer from the exhaust valves

    C

    Block cooling water passages to the head

    D

    Excessive scavenging air provided to the engine


    正确答案： C
    解析： 暂无解析

  • 第6题：

    填空题
    Large quantities of water (need) ____ for cooling purposes.

    正确答案： are needed
    解析：
    本题考查主谓一致。句意：冷却需要大量的水。由“kind/ form/ sort/ type/ portion/ quantity+of”修饰主语时，其谓语形式取决于这些词本身的单复数而不是后面跟的名词。quantities是复数形式，所以系动词用are。

  • 第7题：

    单选题
    Low cylinder compression pressure and a high exhaust temperature may indicate （）
    A

    early fuel injection timing

    B

    leaking valves

    C

    a continuously open scavenge air port

    D

    low cooling water temperature


    正确答案： C
    解析： 暂无解析

  • 第8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9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10题：

    单选题
    Large quantities of water______needed for cooling purposes.
    A

    are

    B

    is

    C

    have

    D

    has


    正确答案： C
    解析：

  • 第11题：

    单选题
    A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
    A

    reduce the engine load

    B

    increase the cooling water flow

    C

    increase the lube oil pressure

    D

    adjust the fuel rack


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
    A

    the temperature and flow quantity of the exhaust gas from M/E

    B

    the quantity of steam demanded

    C

    the rotary speed and the cooling water temperature of main engine

    D

    efficiency of M/ turbocharger


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Auxiliary diesel engines can be automatically shut down as a result of （）
    A

    low lube oil temperature

    B

    low lube oil pressure

    C

    high exhaust temperature

    D

    high cooling water pressure


    正确答案： C
    解析： 暂无解析

  • 第14题：

    单选题
    The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.
    A

    to be kept

    B

    logged

    C

    changed

    D

    has remained


    正确答案： B
    解析： 暂无解析

  • 第15题：

    单选题
    A water jacket is placed around the exhaust manifolds of propulsion diesel engines to（）
    A

    reduce heat radiation to the engine room

    B

    aid in preventing turbocharger overheating

    C

    condense and drain moisture from exhaust gases

    D

    dampen exhaust gas pulsations in the manifold


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    While maneuvering, you discover heavy smoke coming from the turbocharger casing, you should （）
    A

    check the air filter for dirt

    B

    check for an exhaust leak

    C

    check the cooling water temperature

    D

    notify the bridge that you are going to shut the engine down


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is （）
    A

    air binding of the engine cooling system

    B

    a cracked water cooled exhaust manifold

    C

    blockage in the heat exchanger

    D

    faulty operation of the thermostat


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    The satisfactory operation of diesel engine exhaust valves usually depends on（）
    A

    the proper back pressure

    B

    the cooling water temperature

    C

    correct timing and proper seating

    D

    accurate metering and the exhaust temperature


    正确答案： C
    解析： 暂无解析

  • 第19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20题：

    单选题
    If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
    A

    loss of suction in the circulating pump

    B

    leak in the primary cooling system

    C

    broken raw water pump shaft

    D

    burned or cracked piston in one cylinder


    正确答案： D
    解析： 暂无解析

  • 第21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22题：

    单选题
    Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.
    A

    cylinder covers

    B

    lubricating space

    C

    crosshead

    D

    exhaust manifold


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）
    A

    Air will enter the cooling system

    B

    Carbon will plug the water cooled exhaust manifolds

    C

    The jacket water temperature will rise

    D

    The lube oil viscosity will increase


    正确答案： A
    解析： 暂无解析

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