ESCO Air Conditioning Exam | 100% Correct Answers | Verified | Latest 2024 Version 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 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 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 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 compressor clearance space The clearance space in reciprocating compressor - ✔✔Has an effect on compressor capacity Which of the following types of air conditioning compressor is most energy -efficient - ✔✔Scroll Which of the following represent the right order for the functions of a condenser - ✔✔De-superheat, Condenses, Subcools
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ESCO Air Conditioning Exam | 100% Correct Answers | Verified | Latest 2024 Version
Preview 2 out of 9 pages
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 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 sp
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