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

题目

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

相似考题

1.下面哪些攻击属于服务攻击？ I、邮件炸弹攻击II、源路由攻击III、地址欺骗攻击IV.DOS攻击（ ）A．I和IIB．II和IIIC．II和IVD．I和IV

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 II III、increase thermal capacity IV、 resist corrosionA.I + IIB.II + IIIC.III + IVD.I + IV

3.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

4.The cooling water of the diesel engine should be treated with chemical, because it contains .A.alkaliB.acidityC.salinityD.impurity

更多“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”相关问题

  • 第1题：

    网络安全技术主要是研究:安全攻击、安全机制和安全服务,以下I.有损网络安全的操作II.用于检测、预防的机制III.安全攻击恢复机制IV.信息传输安全性哪个(些)是属于安全机制方面的内容()

    A.I和II

    B.II和III

    C.III和IV

    D.I和IV


    参考答案：B

  • 第2题：

    Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.

    A.increase power output

    B.decrease lube oil viscosity

    C.eliminate fuel knock

    D.cause sulfuric acid formation


    正确答案：D

  • 第3题：

    以下属于金融市场泡沫特征的是（ ）
    I乐观的预期
    II大量“幼稚投资者”的涌入
    III认知偏差
    IV庞氏骗局

    A.II、III、IV
    B.I、III
    C.III、IV
    D.I、II、IV

    答案：D
    解析：
    金融市场泡沫的特征有：乐观的预期、大量“幼稚投资者”的涌入、价格与价值的严重背离、庞氏骗局、泡沫破裂和经济冲击。

  • 第4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： B
    解析： 暂无解析

  • 第5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6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7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： D
    解析： 暂无解析

  • 第8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： B
    解析： 暂无解析

  • 第9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10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： D
    解析： 暂无解析

  • 第11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12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13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：A

  • 第14题：

    根据中国海商法规定，海上旅客运输合同中加入哪些条款是无效的：I、免除承运人对旅客应当承担的法定责任 II、降低承运人责任限额 III、对举证责任作出相反规定 IV、限制旅客赔偿请求权

    A.I~II

    B.II~III

    C.III~IV

    D.I~IV


    正确答案：D

  • 第15题：

    单选题
    If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）
    A

    a broken shaft on the freshwater pump

    B

    an excessive accumulation of scale exchanger

    C

    an incorrect thermostatic element operating range

    D

    lube oil in the cooling water


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.
    A

    reduce water temperature

    B

    reduce water turbulence

    C

    provide an air cushion

    D

    allow for an increase in water volume as the engine warms up


    正确答案： B
    解析： 暂无解析

  • 第17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18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： D
    解析： 暂无解析

  • 第19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20题：

    单选题
    The cooling water of the diesel engine should be treated, because it has（）
    A

    alkale scence

    B

    acidity

    C

    salinity

    D

    impurity


    正确答案： D
    解析： 暂无解析

  • 第21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22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

  • 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： C
    解析： 暂无解析

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