In an air conditioning system, moisture is removed from the air by ______.A.filtersB.separatorsC.ducted trapsD.dehumidifiers

题目

In an air conditioning system, moisture is removed from the air by ______.

A.filters

B.separators

C.ducted traps

D.dehumidifiers

相似考题

1.Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?A.Cooling the air to a temperature just above dew pointB.Heating the air to a point at which moisture will boil off ,then re-cooling itC.Cooling the air to a point below dew point, then reheating itD.Heating the air and then cooling it to a point below dew point

2.Restrictions occurring in the small orifices(孔) of pneumatic control system components can be caused by ______.A.moisture in the compressed air supplyB.excessive dryness in the compressed air supplyC.pressure surging in the compressed air receiverD.insufficient lubrication of the system components

3.The moisture equilibrium chart can be used to determine the ______．A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsB.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityC.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoD.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo

4.Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine byA.natural aspirationB.masked intake valvesC.air ceilsD.scavenging air

更多“In an air conditioning system, moisture is removed from the air by ______.A.filtersB.separ ”相关问题

  • 第1题：

    单选题
    Air blowing from the intake air filter of an operating air compressor indicates （）.
    A

    broken inlet valves

    B

    broken discharge valves

    C

    pulsations in the air distribution system

    D

    overloading of the air distribution system


    正确答案： A
    解析： 暂无解析

  • 第2题：

    单选题
    When used in conjunction with a turbocharger, the main function of an after-cooler is to （）
    A

    increase the density of the cylinder air charge

    B

    prevent turbocharger overheating

    C

    liminate the need for a pre-cooler

    D

    remove moisture from air compressed by the turbocharger


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    In an air conditioning system, moisture is removed from the air by（）
    A

    filers

    B

    separators

    C

    ducted traps

    D

    dehumidifiers


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    A re-heater, as used in an air conditioning system, is designed to control the （）
    A

    chilled water temperature

    B

    dew point temperature

    C

    primary air temperature

    D

    dry bulb temperature


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）
    A

    Chilled water system supply temperature

    B

    Chilled water system return temperature

    C

    Compressor discharge temperature

    D

    Compressor suction pressure


    正确答案： D
    解析： 暂无解析

  • 第6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7题：

    单选题
    Clouds form（）.
    A

    as a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small droplets

    B

    as winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming clouds

    C

    dry air compresses moisture from the atmosphere into clouds

    D

    when the relative humidity of the atmosphere is low


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.
    A

    superheated

    B

    saturated

    C

    condensed

    D

    convected


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    With ducted air conditioning systems, the modern tendency is to use（）
    A

    central air conditioning system

    B

    high velocity system

    C

    low velocity system

    D

    single duct system


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）
    A

    admit only enough fresh outside air to provide proper ventilation

    B

    reduce the air reheating system load

    C

    lower the compressor head pressure

    D

    operate the purge recovery unit continuously


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?（）
    A

    Cooling the air to a temperature just above dew point

    B

    Heating the air to a point at which moisture will boil off ,then re-cooling it

    C

    Cooling the air to a point below dew point, then reheating it

    D

    Heating the air and then cooling it to a point below dew point


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Hot air can hold（）.
    A

    less moisture than cold air

    B

    more moisture than cold air

    C

    the same amount of moisture as cold air

    D

    moisture independent of air temperature


    正确答案： A
    解析： 暂无解析

  • 第13题：

    单选题
    If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.
    A

    evaporation

    B

    condensation

    C

    liquefies

    D

    vaporization


    正确答案： D
    解析： 暂无解析

  • 第14题：

    单选题
    In an air conditioning system, low head pressure associated with a reciprocating compressor can be the result of （）
    A

    broken valve springs

    B

    tight drive belts

    C

    high line voltage

    D

    air in the system


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    A re-heater in an air conditioning system functions to （）.
    A

    control inlet air temperature

    B

    control inlet air volume

    C

    maintain relative humidity at 15%

    D

    restore conditioned air temperature to a comfortable level


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    Air or noncondensable gas is removed from a refrigeration system by a （）
    A

    separating chamber

    B

    system of baffles

    C

    purge valve

    D

    vacuum reducing valve


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large city buildings are equipped with their own air-conditioning systems.These systems help keep the buildings cool，but they can also damage the environment.Since they use a lot of electricity，for instance，they contribute indirectly to global warming.In addition，the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons，or CFCs，that are believed to damage the Earth's ozone layer.Recently，though，a system has been built in the city of Toronto，Canada，that cools buildings with little damage to the environment. In the traditional air-conditioning systems found in most large buildings，water is pumped through the building in a continuous cycle.The water is first cooled to a temperature of 4℃ in machines called chillers.It is then sent to individual units that cool the air in each room.As the water flows through the building，it gradually becomes warmer.Finally，it reaches the roof ，where it is left to cool down naturally in a water tower.After that it is returned to the chillers，where the cycle begins again.Toronto lies on the shore of Lake Ontario，one of North America's Great Lakes，and the new system makes use of cold water taken from about 80 meters below the surface of the lake.At this depth，the water in the lake remains at 4℃ all year round.This is exactly the temperature to which the water in air-conditioning systems is cooled.However，the water from the lake is not pumped directly into the air-conditioning systems.Instead，it is used to cool the water that is already inside the air-conditioning systems.After that，the lake water is added to the city's ordinary water supply.Enwave，the company that developed this deep-lake cooling system，says that it uses 75 percent less energy than traditional air conditioning.And since no CFCs are used，no damage can be caused to the ozone layer.Not every city is located next to a large lake，but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water.What is the function of the chillers in a traditional air-conditioning system?
    A

    They pump the air continuously to the units in each room.

    B

    They lower the temperature of the water in the system.

    C

    They help the water cool down naturally on the roof .

    D

    They gradually clean the water as it flows through the building.


    正确答案： A
    解析：

  • 第18题：

    单选题
    As the air passes through the charge air cooler, its temperature may be reduced and moisture condensed, with the condensate in danger of being carried into the engineSo a water separator should be mounted beneath the bottom part of the engine inlet manifoldA water separator is used in order to （）.
    A

    keep the air from being carried into the engine

    B

    keep the moisture from being condensed

    C

    keep the danger from being carded into the engine

    D

    take away the condensate from the air


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    The process of removing moisture from air is known as（）.
    A

    humidification

    B

    dehumidification

    C

    vaporization

    D

    evaporation


    正确答案： D
    解析： 暂无解析

  • 第20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21题：

    单选题
    Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）
    A

    A room thermostat activates an electric heater at each individual chilled air outlet when necessary

    B

    Varying the number of passes the air makes across the coils

    C

    Varying the temperature of the water through the coils

    D

    Varying the quantity of water flowing through the coils


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
    A

    purge lube oil from the liquid refrigerant

    B

    recover water purged from the system

    C

    separate foul gases from the receiver

    D

    purge non-condensable gases without losing refrigerant


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    The main distribution duct in an air conditioning system which contains the cooling coils and filters is called the（）
    A

    manifold

    B

    condenser

    C

    chamber

    D

    plenum


    正确答案： B
    解析： 暂无解析

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