Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid line If excess moisture is present in the system, the indicator willA.activate the driersB.change colorC.secure the compressorD.add a

题目

Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid line If excess moisture is present in the system, the indicator will

A.activate the driers

B.change color

C.secure the compressor

D.add a predetermined amount of liquid drier

相似考题

1.Moisture is removed from a refrigeration system byA.bleeding refrigerant from the condenserB.opening a drain petcock on the oil separatorC.condensing the water in the heat exchangerD.using a dehydrator cartridge

2.Cargo damaged due to water being present in a cargo hold，as a result of a leak in the hull plating，is said to be damaged by：Ⅰ．Free moisture．Ⅱ．Transfer of hygroscopic moisture．Which of the following is correct?A.Ⅰ onlyB.Ⅱ onlyC.Both Ⅰ and ⅡD.Neither Ⅰ nor Ⅱ

3.A hygroscopic cargo is defined as a cargo ______．A.capable of absorbing moisture in the form of a gasB.capable of giving off moisture in the form of a liquidC.that is shipped in a liquid stateD.that will ignite in contact with water

4.In the refrigeration system, a shortage of refrigerant is indicated byA.the compressor short cycling on high pressure cut out switchB.high suction pressureC.high head pressureD.bubbles in the sight glass

更多“Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid line If excess moisture is present in the system, the indicator willA.activate the driersB.change colorC.secure the compressorD.add a ”相关问题

  • 第1题：

    What is a wet cargo ________．

    A.A liquid cargo carried in the deep tanks

    B.A canned or bottled liquid such as beer

    C.A cargo that contains hygroscopic moisture

    D.A cargo particularly susceptible to damage by moisture


    正确答案：B

  • 第2题：

    单选题
    A refrigeration system contaminated with moisture can be affected by （）.
    A

    acid formation

    B

    sludge formation

    C

    ice in the expansion valve

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第3题：

    单选题
    Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）
    A

    Proper refrigerant charge

    B

    Faulty expansion valve

    C

    Insufficient refrigerant

    D

    Solenoid valve stuck open


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    In an operating refrigeration system low on refrigerant, a liquid line sight glass will（）
    A

    be clear

    B

    be blue

    C

    be light green

    D

    show bubbles


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    Moisture should be kept out of an R-12 system because it tends to cause （）.
    A

    icing of the automatic controls

    B

    embrittlement of some parts of the automatic controls

    C

    sludge in the lubricating oil

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    The moisture equilibrium chart can be used to determine the（）.
    A

    Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists

    B

    Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

    C

    Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo

    D

    Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    A pressure drop in the liquid line of a refrigeration system may cause（）
    A

    the solenoid valve to seize

    B

    the compressor to hunt

    C

    flash gas to form in the liquid line

    D

    the expansion valve to freeze open


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to （）.
    A

    maintain adequate coil back pressure

    B

    prohibit flashing in the liquid line

    C

    reduce refrigerant volume in the system

    D

    reduce compressor discharge line loading


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.
    A

    too much refrigerant in the system

    B

    oil entrained in the refrigerant

    C

    less than a full charge of refrigerant in the system

    D

    ice crystals forming in the refrigerant


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.
    A

    high pressure liquid line

    B

    low pressure liquid line

    C

    high pressure vapor line

    D

    low pressure vapor line


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    The function of （） in a refrigeration plant using Freon is to move moisture from all refrigeration system.
    A

    filter

    B

    filter drier

    C

    heat exchanger

    D

    air cooler


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    Moisture in the refrigerant may （）.
    A

    freeze on the expansion valve seat and reduce the flow of liquid refrigerant

    B

    emulsify the oil in the condenser

    C

    freeze in the king valve

    D

    clog the oil trap


    正确答案： B
    解析： 暂无解析

  • 第13题：

    The moisture equilibrium chart can be used to determine the ______．

    A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists

    B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

    C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo

    D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo


    正确答案：B

  • 第14题：

    单选题
    Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）
    A

    activate the driers

    B

    change color

    C

    secure the compressor

    D

    add a predetermined amount of liquid drier


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    When liquid reaches the compressor of a refrigeration system through the suction line, the condition is called （）.
    A

    flooding back

    B

    superheating

    C

    overflowing

    D

    recycling


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    Moisture is removed from a refrigeration system by（）.
    A

    bleeding refrigerant from the condenser

    B

    opening a drain petcock on the oil separator

    C

    condensing the water in the heat exchanger

    D

    using a dehydrator cartridge


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    Air entering an air-cooled refrigeration system is indicated by （）.
    A

    frosting of the liquid line

    B

    higher than normal head pressure

    C

    a clear sight glass

    D

    abnormally cold reefer boxes


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Moisture in a refrigeration system can cause （）.
    A

    freezing the expansion valve closed

    B

    corrosion of system piping

    C

    improper temperature regulation

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    In the refrigeration system, a shortage of refrigerant is indicated by （）.
    A

    the compressor short cycling on high pressure cut out switch

    B

    high suction pressure

    C

    high head pressure

    D

    bubbles in the sight glass


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.
    A

    condition of the expansion valve

    B

    moisture in the system

    C

    condition of the compressor suction valves

    D

    condenser temperature


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.
    A

    the system is fully charged

    B

    there is air leaking in from the condenser

    C

    ice crystals are forming in the refrigerant

    D

    the system contains less than a full charge of refrigerant


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    A hygroscopic cargo is define as a cargo（）.
    A

    capable of absorbing moisture in the form of a gas

    B

    capable of giving off moisture in the form of a liquid

    C

    that is shipped in a liquid stste

    D

    that will ignite in contact with water


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    The presence of bubbles in a refrigeration system liquid line may （）.
    A

    promote refrigerant dehydration

    B

    be absorbed in the receiver

    C

    cause low condensing pressure

    D

    carry moisture and lead to corrosion


    正确答案： B
    解析： 暂无解析

相关内容