ESCO Air Conditioning Exam Questions & 100% Verified Answers | Latest Update | Already Graded A+

Heat which causes a change in temperature of a substance is called : Sensible heat Heat added to a substance without a rise in temperature : Latent heat Heat added to the refrigerant in a vapor state after the evaporation process is called : Superheat Scroll compressor move refrigerant by : Involute Spirals The movement of heat by way of fluid is called : Convection The movement of heat by direct contact is : Conduction 2 | P a g e The standard unit for measuring the quantity of heat in a substance is : BTUs Refrigerant gives up heat when : It condenses Why must refrigerant in the suction line be slightly warmer than the saturation temperature? : Prevent liquid slugging of the compressor The state of the refrigerant in the suction line should be : Low pressure / Low temperature vapor The state of the refrigerant entering the condenser is : High pressure / Highly superheated vapor The evaporator : Transfers heat from the refrigerated space to the refrigerant Which of the following is not a thermodynamic property of refrigerants : Flammability 3 | P a g e The sequential order of steps in the vapor compressions process are : Compression, Condensation, Expansion, Vaporization If a 30 pound cylinder of reclaimed R 410 a refrigerant has been stored overnight at 70° the pressure in the cylinder should be approximately : 201 psig Fan airflow pressures are usually measured in : Inches of water column 0 pounds per square inch absolute is : A pressure which cannot be further reduced 0 pounds per square inch gauge is : The same as atmospheric pressure The temperature at which moisture will start to condense from the air is called : Dew point temperatur