The sum of the sensible heat and the latent heat of any substance is known as ______.A.total heatB.residual heatC.specific heatD.superheat
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
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单选题The process during which liquid containing a reasonable amount of sensible heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called （）.Aboiling offBflash evaporationCcondensationDnone of the above
单选题The process that occurs when heat is generated by a chemical reaction within a substance and continues to a point of ignition is known as （）.Achemical ignitionBspontaneous combustionCchemical combustionDradiation ignition
单选题The heat gained per pound of refrigerant in the evaporator is known as the（）.Alatent heat of vaporizationBsensible heatCrefrigerating effectDspecific heat of vaporization
单选题Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance?（）ARadiationBConductionCNatural convectionDAll of the above
单选题The four basic components of a fire are chain reaction, heat, fuel, and （）.Acarbon monoxideBoxygenCcarbon dioxideDany gaseous substance
单选题The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by （）.Apassing it through the expansion valveBcondensing refrigerant in the system condenserCpassing the gaseous refrigerant through the heat interchanger on the suction side of the compressorDmaintaining a high pressure on the systems receiver
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单选题Which of the following statements is correct concerning heat transfer?（）AHeat is given off from a high temperature region known as a heat sinkBHeat transfer rate is affected most by the size of the heat sink involvedCHeat transfer rate is affected most by the temperature difference between the heat source and the heat sinkDHeat transfer by radiation will occur only by mass motion of a fluid substance
单选题Latent heat changes the （） of water.Aphysical stateBtemperatureCatmospheric pressureDsensible pressure
单选题The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of （）.AfusionBvaporizationCcondensationDsublimation
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单选题The heat required to change a substance from a liquid to a gas without experiencing a temperature change is defined as the latent heat of （）.AfusionBvaporizationCsublimationDcondensation
单选题The latent heat of water vapor in air is dependent upon the （）Adry bulb temperatureBwet bulb temperatureCdew pointDdry point
单选题The sensible heat of air is dependent upon the （）.Adry bulb temperatureBwet bulb temperatureCsaturation temperatureDwater vapor superheat