衰变热 decay heat

题目

衰变热 decay heat

相似考题

1.For what purpose are the diving pipes used?A. To absorb heat from the sun.B. To store heat for future use.C. To turn solar energy into heat energy.D. To carry heat down below the surface.

2.The heat gained per pound of refrigerant in the evaporator is known as the ______.A.latent heat of vaporizationB.sensible heatC.refrigerating effectD.specific heat of vaporization

3.Libraries are an investment for the future and should not be allowed to fall into____. A. dissolution B. decay C. decline D. depression

4.According to the passage, which of the following statement is not true?A.the heat exchanging surfaces should be kept substantially cleanB.the heat exchanger flow passages should be clear of obstructionC.seals for the plate heat exchanger needs to be renewed oftenD.the cleaning process of the plate heat exchanger should be done following our experiences only

更多“衰变热 decay heat”相关问题

  • 第1题：

    Decay是什么意思？和inactivation有何区别？


    正确答案:Decay是“衰减”之意，inactivation是“失活”之意，但在文献中经常混用，decay也常常被说成失活，例如钙电流的衰减常被说成失活，这样用也没什么问题。但实际上，两者细分的话还是有区别的。可以将Inactivation分为稳态失活与非稳态失活。后者即Decay，是指在刺激因素（电位变化、施加药物等）持续存在下通道的失活，而稳态失活（Steady-state inactivation）一般是指将膜电位钳制在不同的水平，然后观察通道的失活情况，做出失活曲线。

  • 第2题：

    形变热


    正确答案:向纤网提供热量的另一个重要来源是形变热。轧辊间的压力使处于轧辊钳口的高聚物产生宏观放热效应，导致纤网温度进一步上升。

  • 第3题：

    腐解作用 decay


    正确答案: 微生物对新鲜有机物的破坏和分解。

  • 第4题：

    单选题
    The spreading of fire as a result of heat being carried through a vessels ventilation system, is an example of heat transfer by （）.
    A

    conduction

    B

    convection

    C

    radiation

    D

    windage


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    The sum of the sensible heat and the latent heat of any substance is known as （）.
    A

    total heat

    B

    residual heat

    C

    specific heat

    D

    superheat


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    Which of the statements listed concerning heat transfer is correct?（）
    A

    Heat is always transferred at a constant rate

    B

    Heat transfer rate increases as temperature difference increases

    C

    The rate of heat transfer is not affected by temperature difference

    D

    The high temperature region is known as a heat sink


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Which of the following statements is correct concerning heat transfer?（）
    A

    Heat is given off from a high temperature region known as a heat sink

    B

    Heat transfer rate is affected most by the size of the heat sink involved

    C

    Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink

    D

    Heat transfer by radiation will occur only by mass motion of a fluid substance


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    The reason why the laser beam is very strong is that ______.
    A

    it is artificially illuminated

    B

    it is made up of a concentrated beam of light

    C

    it sends out heat in all directions

    D

    its heat is increased by the heat of the sun


    正确答案： D
    解析：
    事实细节题。由关键词why the laser beam is very strong定位第二段最后一句可知“能量被集中到一起而变得强大”。故答案为B项。

  • 第9题：

    名词解释题
    腐解作用 decay

    正确答案： 微生物对新鲜有机物的破坏和分解。
    解析： 暂无解析

  • 第10题：

    单选题
    The heat identified by only a change in temperature is known as （）.
    A

    sensible heat

    B

    latent heat

    C

    total heat

    D

    residual heat


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    The amount of heat released by steam when it changes to water at the same temperature is called（）.
    A

    latent heat of condensation

    B

    latent heat of vaporization

    C

    latent heat of saturation

    D

    sensible heat of condensation


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to（）.
    A

    reduce electrolytic action on heat exchanger metals

    B

    keep heat transfer surfaces shiny and clean

    C

    prevent rapid accumulation of marine growth

    D

    provide a protective coating on heat exchanger surfaces


    正确答案： A
    解析： 暂无解析

  • 第13题：

    如何判断锅炉变热面堵灰？


    正确答案: 锅炉受热面严重堵灰可以从仪表上判断出来，堵灰的受热面以前的烟道负压减小，受热面以后的负压增大，受热面的工质出口温度降低而烟气出口温度上升.锅炉堵灰最严重的受热面多是空气预热器.

  • 第14题：

    Post-source decay(源后衰变)


    正确答案: 发生在离子源后的第一个无场区域，时间跨度为微秒；由于发生在无场区域，所以产生的不同片段离子和母离子保持同样速度，用离子镜反射，将片段离子和母离子分离，按质量大小排列可形成离子谱，称为PSD谱

  • 第15题：

    Select 3 features of IBM’s CoolBlue Energy Management Innovation：（）

    • A、IBM Active Energy Manager， Calibrated Vectored Cooling， and Water Chilled Door eXchanger  
    • B、IBM Active Energy Manager， Front Door Heat eXchanger， and Calibrated Vectored Cooling
    • C、Power Configurator， Calibrated Vectored Cooling， and Rear Door Heat eXchanger
    • D、Thermal Diagnostics， Front Door Heat eXchanger， and Rear Door Heat eXchanger

    正确答案:C

  • 第16题：

    问答题
    Eukaryotic mRNA decay主要有哪些方式？

    正确答案： 主要有两种：首先，poly-A逐渐缩短，当polyA短于30个时不稳定，然后：
    1）5’脱帽，从5’→3’快速降解；
    2）不脱帽，迅速从3’→5’降解。
    解析： 暂无解析

  • 第17题：

    单选题
    The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）
    A

    latent heat of expansion

    B

    sensible heat of condensation

    C

    heat of compression

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    The rate of heat transfer from a hot region to a cold region is affected most by the （）.
    A

    size of the heat sink

    B

    temperature difference between the regions

    C

    size of the heat source

    D

    total heat of the system


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
    A

    remain constant along the tubes length

    B

    be greatest in a single pass counter flow heat exchanger

    C

    remain constant throughout the heat exchanger

    D

    vary from section to section through out the heat exchanger


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    The purpose of designing some waste heat boilers with sinuous fire tubes, is to（）
    A

    increase exhaust gas velocity through the boiler

    B

    reduce accumulations of carbon deposits on the heat transfer surfaces

    C

    eliminate exhaust gas pulsations and noise

    D

    increase the rate of heat transfer to the waterside


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following is true of the heating system of the Johnstown campus?
    A

    The heat is supplied by human bodies only.

    B

    The heat is supplied by both human bodies and other heat-emitting objects.

    C

    The heat is supplied by both human bodies and conventional fuel.

    D

    The heat is supplied by human bodies, other heat-emitting objects, and conventional fuel.


    正确答案： A
    解析：

  • 第22题：

    单选题
    The heat used to change a liquid to a vapor is called （）.
    A

    latent heat of fusion

    B

    latent heat of vaporization

    C

    specific heat of vaporization

    D

    latent heat of the gas


    正确答案： D
    解析： 暂无解析

  • 第23题：

    名词解释题
    形变热

    正确答案： 向纤网提供热量的另一个重要来源是形变热。轧辊间的压力使处于轧辊钳口的高聚物产生宏观放热效应，导致纤网温度进一步上升。
    解析： 暂无解析

相关内容