ESCO AC test prep Questions and Answers 100% Pass

ESCO AC test prep Questions and Answers 100% Pass 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 The standard unit for measuring the quantity of heat in a substance is - BTUs 2 100% Pass Guarantee Katelyn Whitman, All Rights 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 - Critical Point 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 3 100% Pass Guarantee Katelyn Whitman, All Rights 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 temperature A compound pressure gauge measures - Pressure and vacuum Mechanical shaft seal is necessary on a - Open drive compressor Liquid slugging is - Liquid refrigerant in the co