High diesel engine cooling water temperatures can be caused by ______.A.air in the cooling systemB.an overhauled water pumpC.correct amount of coolantD.no air in the cooling system

题目

High diesel engine cooling water temperatures can be caused by ______.

A.air in the cooling system

B.an overhauled water pump

C.correct amount of coolant

D.no air in the cooling system

相似考题

1.Low compression in a diesel engine could be caused byA.worn or broken cylinder liner sealing ringsB.high cooling water temperatureC.worn or broken piston ringsD.low fuel oil pressure

2.Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.A.increase power outputB.decrease lube oil viscosityC.eliminate fuel knockD.cause sulfuric acid formation

3.单选题During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）A notify the duty officer, reduce the engine speed, take some measures to remove failuresB notify the duty officer and stop the engine immediately, find the cause and remove failuresC notify the C/ED notify the captain

4.Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?A.Baffle plates that have been bent during prior removalB.Leaks m the cooler tube nestC.Operating the engine while maintaining a high sea water outlet temperatureD.A punctured sea water strainer supplying cooling water to the heat exchanger

更多“High diesel engine cooling water temperatures can be caused by ______.A.air in the cooling ”相关问题

  • 第1题：

    单选题
    Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?（）
    A

    Baffle plates that have been bent during prior removal

    B

    Leaks in the cooler tube nest

    C

    Operating the engine while maintaining a high sea water outlet temperature

    D

    A punctured sea water strainer supplying cooling water to the heat exchanger


    正确答案： C
    解析： 暂无解析

  • 第2题：

    单选题
    An over-speed trip stops a diesel engine when the engine （）
    A

    runs out of fuel

    B

    has low lubricating oil pressure

    C

    exceeds a set maximum speed

    D

    has high cooling water temperature


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    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 corrosion
    A

    Ⅰ+Ⅱ

    B

    Ⅱ+Ⅲ

    C

    Ⅲ+Ⅳ

    D

    Ⅰ+Ⅳ


    正确答案： D
    解析： 暂无解析

  • 第4题：

    单选题
    If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）
    A

    a dirty lube oil strainer

    B

    internal water leaks

    C

    an oil suction line restriction

    D

    excessive wears of the cooling water pump


    正确答案： B
    解析： 暂无解析

  • 第5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6题：

    单选题
    In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）
    A

    improper venting of the cooling system

    B

    carrying the expansion tank water level too high

    C

    a totally clogged impeller in the cooling water pump

    D

    an incorrectly set cooling system temperature control


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    Low compression in a diesel engine could be caused by（）
    A

    worn or broken cylinder liner sealing rings

    B

    high cooling water temperature

    C

    worn or broken piston rings

    D

    low fuel oil pressure


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following statements is correct concerning diesel engine cooling water systems?（）
    A

    Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation

    B

    propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder

    C

    At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers

    D

    Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
    A

    cooling water pump

    B

    nozzle cooling passages

    C

    cylinder jackets

    D

    heat exchanger


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause （）.
    A

    the formation of sulfuric acid

    B

    a decrease in lube oil viscosity

    C

    a decrease in cooling water pH

    D

    a thermostat failure


    正确答案： A
    解析： 暂无解析

  • 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
    High diesel engine cooling water temperatures can be caused by （）.
    A

    a worn water pump

    B

    not enough coolant

    C

    air in the cooling system

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    The device allowing for the change in volume of the cooling water in a propulsion diesel engine closed cooling system is the （）.
    A

    fresh water expansion tank

    B

    sea water expansion tank

    C

    thermostatic expansion valve

    D

    jacket water cooler accumulator


    正确答案： D
    解析： 暂无解析

  • 第14题：

    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


    正确答案： C
    解析： 暂无解析

  • 第15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16题：

    单选题
    If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
    A

    a low level in the engine expansion tank

    B

    excessively high coolant pressure

    C

    improper temperatures

    D

    malfunctioning of the jacket water heater


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    High diesel engine cooling water temperatures can be caused by （）.
    A

    air in the cooling system

    B

    an overhauled water pump

    C

    correct amount of coolant

    D

    no air in the cooling system


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to （）
    A

    maintain low pH in the cooling water

    B

    reduce the cooling water temperature

    C

    increase cooling water hardness

    D

    form a protective film on metal surfaces


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）
    A

    raw water pump discharge

    B

    expansion tank outlet

    C

    cooling water heat exchanger

    D

    outlet engine jacket water outlet


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）
    A

    Defective temperature controls in the system

    B

    Cavitation in the cooling water pump

    C

    Opened vent in the cooling system

    D

    Restricted water passages in the engine


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Lubricating oil viscosity in an operating diesel engine can be reduced by（）
    A

    increasing cooling water flow

    B

    increasing lube oil flow

    C

    dilution by fuel oil

    D

    adding SAE 70 oil


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    Diesel engine piston seizure can be caused by （）
    A

    poor cooling of cylinder walls

    B

    improper cooling of the piston

    C

    insufficient piston lubrication

    D

    all of the above


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）
    A

    cooling water of the cooling system

    B

    fuel of the FO system

    C

    LO of the LO system

    D

    cooling water of the cooling system and LO of the LO system


    正确答案： A
    解析： 暂无解析

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