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The heat gained per pound of refrigerant in the evaporator is known as the ______.
A.latent heat of vaporization
B.sensible heat
C.refrigerating effect
D.specific heat of vaporization
参考答案
更多 “ 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 ” 相关考题
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The temperature of the refrigerant in the evaporator coil depends mostly upon the ___.A.refrigerant pressure in the evaporatorB.cooling water temperature to the condenserC.heat load in the refrigerator compartmentD.solenoid valve in the liquid line
考题
The heat identified by only a change in temperature is known asA.sensible heatB.latent heatC.total heatD.residual heat
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Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.A.carbon deposits on the compressor suction valvesB.the evaporator temperature to increaseC.rapid corrosion of the thermal expansion valveD.no operating problems
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单选题When you adjust a thermostatic expansion valve, （）.A
refrigerant must be bled off the sensing line before adjustments are madeB
all refrigerant must be pumped into the receiver before adjustments are madeC
time must be allowed for conditions to stabilize in the evaporator before further adjustments are madeD
all refrigerant must be routed through the dehydrator while changing the superheat setting
考题
单选题The refrigerant flows through the evaporator, where it （） heat from the refrigerated space.A
extractsB
releasesC
gives noD
absorbs no
考题
单选题An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.A
restriction in refrigerant pipingB
air and non-condensable gases in the condenserC
water in the refrigerantD
flooding back of liquid refrigerant from the evaporator
考题
单选题The sum of the sensible heat and the latent heat of any substance is known as （）.A
total heatB
residual heatC
specific heatD
superheat
考题
单选题In a refrigeration system, the refrigerant absorbs the latent heat of vaporization in the（）.A
compressorB
condenserC
receiverD
evaporator
考题
单选题The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）A
latent heat of expansionB
sensible heat of condensationC
heat of compressionD
all of the above
考题
单选题Which of the following terms represents the form of heat removed from the refrigerant in the condenser of a refrigeration system?（）A
Latent heat of vaporizationB
Heat of compressionC
SuperheatD
All of the above
考题
单选题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
考题
单选题The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by （）.A
passing it through the expansion valveB
condensing refrigerant in the system condenserC
passing the gaseous refrigerant through the heat interchanger on the suction side of the compressorD
maintaining a high pressure on the systems receiver
考题
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 （）.A
fusionB
vaporizationC
condensationD
sublimation
考题
单选题Less scale formation occurs in a flash evaporator than in a submerged tube evaporator because （）.A
the distillate produced has greater purityB
no boiling occurs on heat transfer surfacesC
evaporation occurs at a higher rateD
the incoming feed is at a higher temperature
考题
单选题Because the expansion valve is just （） way open, the refrigerant is under low pressure in the evaporator.A
littleB
fewC
a littleD
a few
考题
单选题The saturation temperature of the refrigerant must be （） that required in the evaporator refrigerated space.A
aboveB
belowC
equal toD
None of the above
考题
单选题The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.A
refrigerant pressure in the evaporatorB
cooling water temperature to the condenserC
heat load in the refrigerator compartmentD
solenoid valve in the liquid line
考题
单选题Scale accumulation on evaporator heat exchange surfaces （）.A
increases brine densityB
increases distillate salinityC
reduces metal corrosionD
reduces heat transfer
考题
单选题The heat identified by only a change in temperature is known as （）.A
sensible heatB
latent heatC
total heatD
residual heat
考题
单选题A refrigerant gives up heat when it goes through （）.A
condenserB
regurgitateC
evaporatorD
boil coil
考题
单选题The thermal expansion valve reacts directly to the （）A
temperature in the space being cooledB
liquid refrigerant pressure at the solenoid valveC
pressure drop across the evaporator coilsD
refrigerant gas superheat at the coil outlet
考题
单选题The refrigerant leaves the evaporator of a refrigeration system as a low pressure （）.A
sub-cooled liquidB
high temperature liquidC
oil saturated liquidD
superheated vapor
考题
单选题The component of a refrigerating system in which the refrigerant vaporizes and absorbs heat is known as the （）.A
condenserB
vapor generatorC
accumulatorD
evaporator
考题
单选题In practice, the refrigerant flow after the evaporator is designed to ensure that the vapor leaving the evaporator is slightly （）.A
saturatedB
super-cooledC
wetD
superheated
考题
单选题In a flash distilling unit, evaporator feed (seawater) first absorbs heat in the （）.A
vapor feed heaterB
air ejector condenserC
saltwater heaterD
distillate cooler
考题
单选题The distance gained in the direction of the original course when you are making a turn is known as（）.A
advanceB
driftC
tactical diameterD
transfer
考题
单选题Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause （）.A
carbon deposits on the compressor suction valvesB
the evaporator temperature to increaseC
rapid corrosion of the thermal expansion valveD
no operating problems
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