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

题目
填空题
Large quantities of water (need) ____ for cooling purposes.
相似考题

1.—Why does the stream smell terrible? —Because large quantities of water_____.A、have pollutedB、is being pollutedC、has been pollutedD、have been polluted

2.--Why does the Lake smell terrible?--Because large quantities of water .A. have polluted B. is being polluted C. has been polluted D. have been polluted

3.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

4.What is head tank in the closed cooling water system used for?A.for the release of air from the cooling waterB.providing expansion room for heated cooling waterC.a place for implementing water and water treatment agentD.all of the above

更多“Large quantities of water (need) ____ for cooling purposes.”相关问题

  • 第1题：

    Why is it necessary to have routine testing of the cooling water?

    A.To ensure that the proper residuals of treatment chemicals, as specified, are maintained all time

    B.To trace leakage in the cooling water system

    C.It is not necessary

    D.To detect the presence of contaminants in the water that may be injurious to the cooling system


    正确答案：A

  • 第2题：

    Cooling water pump


    正确答案: 冷却水泵

  • 第3题：

    单选题
    Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.
    A

    excessive crankcase pressure

    B

    excessive lube oil temperature

    C

    contamination of the lube oil by water

    D

    contamination of the cooling water by lube oil


    正确答案： C
    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
    Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?（）
    A

    discharge side of the centrifugal pump

    B

    suction side of the centrifugal pump

    C

    the lowest point of the cooling water system

    D

    inlet of the main engine


    正确答案： D
    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
    When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
    A

    to cut down the amount of cooling water needed

    B

    to prevent an excess amount of cooling water from being discharged to the bilges

    C

    to supply hot water to the evaporator for more economical operation

    D

    None of the above is tree


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following statements is true concerning an oil cooler?（）
    A

    The oil temperature is less than the cooling water temperature

    B

    The oil pressure is less than the cooling water pressure

    C

    The oil pressure is greater than the cooling water pressure

    D

    The oil flow control valve is always installed in the oil input line


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    Large quantities of water _____ for irrigation.
    A

    is needed

    B

    has needed

    C

    are needed

    D

    need


    正确答案： C
    解析：
    quantities是复数形式，不管后面接的名词是单数还是复数，谓语动词都用复数。句中“大量的水被需要”要用被动语态，故为C。

  • 第10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11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：

    Persons who have swallowed a non-petroleum based poison are given large quantities of warm soapy water or warm salt water to ______.

    A.induce vomiting

    B.absorb the poison from the blood

    C.neutralize the poison in the blood

    D.increase the digestive process and eliminate the poison


    正确答案：A

  • 第14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15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16题：

    单选题
    When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
    A

    to decrease scale formation

    B

    for better cooling effect

    C

    for more economical purpose

    D

    to raise vacuum


    正确答案： A
    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
    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
    Persons who have swallowed a non-petroleum based poison are given large quantities of warm soapy water or warm salt water to （）
    A

    induce vomiting

    B

    absorb the poison from the blood

    C

    neutralize the poison in the blood

    D

    increase the digestive process and eliminate the poison


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following statements is correct for the design and installation of diesel engine cooling water systems?（）
    A

    An alarm device with audible and visible signals is required for all cooling water systems

    B

    Propulsion engines with bores over 200 mm are to be fitted with cooling water jackets

    C

    Each totally enclosed cooling system shall be provided with a suitable head tank

    D

    Drain cocks are to be provided at the lowest points of all cylinder water jackets


    正确答案： D
    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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