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The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．A.Soluble stateB.Solid stateC.Liquefied stateD.Inert state

题目

The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．

A.Soluble state

B.Solid state

C.Liquefied state

D.Inert state

相似考题

1.The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust ______.A.gas compositionB.gas temperatureC.pressureD.timing

2.Which method is used to supply inert gas from a flue gas system to the cargo tanks?A.Exhaust gas pressure from the stackB.High capacity fanC.Inert gas compressorD.Natural aspiration

3.You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?A.Cut in another IG fan to increase gas flowB.Open the pressure control valve until the pressure increasesC.Open the tank isolation valve to the fully open positionD.Reduce the pumping rate

4.How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

更多“The vapor pressure of a gas is the pressure necessary to keep it in a(n)______.A.Soluble s ”相关问题

  • 第1题：

    Reid vapor pressure is ______．

    A.exerted by liquid cargo on the sides of a tank

    B.exerted by liquid cargo on a cargo hose body

    C.the lowest temperature and pressure that will cause a flammable liquid to give off vapors

    D.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature


    正确答案：D

  • 第2题：

    A microbarograph is a precision instrument that provides a ______．

    A.charted record of atmospheric temperature over time

    B.charted record of atmospheric pressure over time

    C.graphic record of combustible gases measured in an atmosphere

    D.graphic record of vapor pressure from a flammable/combustible liquid


    正确答案：B

  • 第3题：

    单选题
    How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）
    A

    De-energizes the charged mist effect

    B

    Maintains a positive pressure on the vent header to cool the flammable vapors

    C

    Inert gas filters out the flammable vapors from the cargo tank spaces

    D

    Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit


    正确答案： D
    解析： 暂无解析

  • 第4题：

    单选题
    The vapor pressure of a substance（）.
    A

    decreases as temperature increases

    B

    increases with the temperature

    C

    is not affected by temperature

    D

    may increase or decrease as the temperature rises


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.
    A

    increase the flow of the cooling water through the condenser

    B

    adjust the high pressure cutout to maintain the desired pressure

    C

    open the hot gas bypass temporarily to reduce capacity

    D

    purge non-condensable gases to reduce the excess pressure


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    A heated bulkhead has the effect on a hygroscopic commodity of（）.
    A

    causing moisture to accumulate against the bulkhead

    B

    lowering the vapor pressure of the commodity

    C

    lowering the dew point of the air

    D

    raising the vapor pressure of the commodity


    正确答案： C
    解析： 暂无解析

  • 第7题：

    问答题
    The difference between a liquid and a gas is obvious (1)____ the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fills it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the space available; it must (2)____ be kept in a closed container, as in the (3)____ of a planet’s atmosphere. The distinction was a prominent feature of early theories (4)____(describe) the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be “dissolved” in a vapor without losing its identity, and another theory held that the two phases are made up of different kinds of molecules (分子). The theories now prevailing (5) t____ a quite different approach by emphasizing what liquids and gases have in common. They are both forms of matter (6)____ have no permanent structure, and they both flow easily. They are fluids.The (7)____(fundament) similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat. Suppose a closed container partially filled with a liquid is heated. The liquid expands, or in other (8)____, becomes less dense; some of it evaporates. In contrast, the vapor above the liquid surface becomes dense as the evaporated molecules are added to it. The combination of temperature and pressure (9)____ which the densities become equal is called the critical point. Above the critical point the liquid and the gas can no longer be (10)____(distinguish); there is a single, undifferentiated fluid phase of uniform density.

    正确答案：
    1.on 根据后面的the conditions of可知此处填on。on the conditions of在…条件下。
    2.therefore 这里表因果关系,所以用therefore。句意:气体容易扩散,所以必须保存在密闭的容器里。
    3.case in the case of在…的情况下,就…而言。根据上下文,这里是说“必须将气体存放在一个密封的容器里,如同一颗行星的大气一样。”
    4.describing 本句中的describe的逻辑主语为theories,故应用现在分词。同时,describe这一动作只说明一种事实,并不与其他动词作时间上的先后比较,不必用完成时。
    5.take take approach采用…方法,符合句意。
    6.that that引导定语从句,修饰forms of matter。
    7.fundamental 句意:液体与气体之间的根本相似性在温度和压强有所提高时变得十分明显。
    8.words in other words换句话说。
    9.at 句意:使液体和气体密度相同的那个状态下的温度和压力被称作临界点。句中的temperature and pressure是先行词,需要一个关系词引导一个定语从句修饰先行词。特定数值的temperature和pressure与at搭配,意为“在某个温度和压力下”。
    10.distinguished 句意:在临界点之上时,气体和液体就很难再区分开来。
    解析： 暂无解析

  • 第8题：

    单选题
    During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.
    A

    ensure penetration and distribution of the fuel in the combustion chamber

    B

    ensure the needle valve is flushed clean during each injection

    C

    prevent combustion gas blowback into the open needle valve

    D

    prevent reflected pressure waves when the needle valve closes


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    A(n) （） is a device which adds to the energy of a liquid or gas causing an increase in its pressure and a movement of the fluid.
    A

    pump

    B

    engine

    C

    turbine

    D

    boiler


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    The expansion valve on a Freon system controls the （）.
    A

    superheat of the gas leaving the compressor

    B

    back pressure in the evaporator

    C

    temperature of the icebox

    D

    superheat of the gas leaving the evaporator


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    The refrigerant leaves the evaporator of a refrigeration system as a low pressure （）.
    A

    sub-cooled liquid

    B

    high temperature liquid

    C

    oil saturated liquid

    D

    superheated vapor


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）
    A

    Exhaust gas pressure from the stack

    B

    High capacity fan

    C

    Inert gas compressor

    D

    Natural aspiration


    正确答案： D
    解析： 暂无解析

  • 第13题：

    What best describes for how long a gas-free test is good ________．

    A.For as long as is indicated on the gas-free certificate

    B.For the instant that it is made

    C.Until valves in line with the tank or compartment are reopened

    D.Until changes in temperature or pressure affect the vapor content in the space


    正确答案：B

  • 第14题：

    A heated bulkhead has the effect on a hygroscopic commodity of ______.

    A.causing moisture to accumulate against the bulkhead

    B.lowering the vapor pressure of the commodity

    C.lowering the dew point of the air

    D.raising the vapor pressure of the commodity


    正确答案：D
    加热舱壁会使液体货物的蒸汽压力升高。

  • 第15题：

    单选题
    During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.
    A

    150 millimeters of water pressure

    B

    125 millimeters of water pressure

    C

    100 millimeters of water pressure

    D

    75 millimeters of water pressure


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
    A

    soluble state

    B

    solid state

    C

    liquefied state

    D

    inert state


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    A flash-type evaporator discharges heated seawater into a chamber that is maintained at a pressure than the vapor pressure of the entering heated seawater, and subsequently the flashed water vapor thereby produced（）
    A

    lower condensing

    B

    higher cooling

    C

    lower cooling

    D

    higher condensing


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
    A

    changing the direction of exhaust gas flow

    B

    increasing the exhaust gas velocity

    C

    changing the exhaust gas weight

    D

    increasing the exhaust gas static pressure


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    A microbarograph is a precision instrument that provides a（）.
    A

    charted record of atmospheric temperature over time

    B

    charted record of atmospheric pressure over time

    C

    graphic record of combustible gases measured in an atmosphere

    D

    graphic record of vapor pressure from a flammable/combustible liquid


    正确答案： C
    解析： 暂无解析

  • 第20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： A
    解析： 暂无解析

  • 第21题：

    单选题
    The direction of the surface wind is（）.
    A

    directly from high pressure toward low pressure

    B

    directly from low pressure toward high pressure

    C

    from high pressure toward low pressure deflected by the earth's rotation

    D

    from low pressure toward high pressure deflected by the earth's rotation


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? （）
    A

    Cut in another IG fan to increase gas flow

    B

    Open the pressure control valve until the pressure increases

    C

    Open the tank isolation valve to the fully open position

    D

    Reduce the pumping rate


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）
    A

    Refrigerator

    B

    Refrigerant

    C

    Cooling medium

    D

    Brine


    正确答案： A
    解析： 暂无解析

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