ESCO Air Conditioning Exam Questions with Answers Latest Update (100% Verified)

ESCO Air Conditioning Exam Questions with Answers Latest Update (100% Verified) Heat added to a substance without a rise in temperature correct answers Latent heat Heat added to the refrigerant in a vapor state after the evaporation process is called correct answers Superheat Scroll compressor move refrigerant by correct answers Involute Spirals The movement of heat by way of fluid is called correct answers Convection The movement of heat by direct contact is correct answers Conduction The standard unit for measuring the quantity of heat in a substance is correct answers BTUs Refrigerant gives up heat when correct answers It condenses Why must refrigerant in the suction line be slightly warmer than the saturation temperature? correct answers Prevent liquid slugging of the compressor The state of the refrigerant in the suction line should be correct answers Low pressure / Low temperature vapor The state of the refrigerant entering the condenser is correct answers High pressure / Highly superheated vapor The evaporator correct answers Transfers heat from the refrigerated space to the refrigerant Which of the following is not a thermodynamic property of refrigerants correct answers Flammability The sequential order of steps in the vapor compressions process are correct answers 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 correct answers 201 psig Fan airflow pressures are usually measured in correct answers Inches of water column 0 pounds per square inch absolute is correct answers A pressure which cannot be further reduced 0 pounds per square inch gauge is correct answers The same as atmospheric pressure ESCO Air Conditioning Exam Questions with Answers Latest Update (100% Solved) The temperature at which moisture will start to condense from the air is called correct answers Dew point temperature A compound pressure gauge measures correct answers Pressure and vacuum Mechanical shaft seal is necessary on a correct answers Open drive compressor Liquid slugging is correct answers Liquid refrigerant in the compressor clearance space The clearance space in reciprocating compressor correct answers Has an effect on compressor capacity Which of the following types of air conditioning compressor is most energy-efficient correct answers Scroll Which of the following represent the right order for the functions of a condenser correct answers De-superheat, Condenses, Subcools Refrigerant R 134a vapor enters the condenser at 124 psi G, 100°F. it leaves as a liquid from the condenser subcooled 20°F and the pressure will be approximately correct answers 87 psig There are three basic types of condensers, air-cooled, water-cooled and the _____________ cooled correct answers Evaporative 10 pounds of refrigerant passing through a water cooled condenser will lose 20 BTUs of heat per pound. If 10 pounds of water passes through the condenser with an entering temperature of 80°F the temperature of the water leaving the condenser is correct answers 100°F The heat removed from the refrigerant by the condenser is correct answers Both sensible and latent heat. An energy recovery ventilator is correct answers an air to air heat exchanger to recover heat When testing the efficiency of an air-cooled condenser, the refrigerant condensing temperature should be approximately ________ higher than the entering air temperature correct answers 30°F When testing the efficiency of a water-cooled condenser, the refrigerant condensing temperature should be approximately _________ higher than the leaving water temperature correct answers 10°F The first function condenser must perform is to correct answers De-superheat A thermostatic expansion valve is designed to maintain correct answers Constant evaporator superheat The automatic expansion valve is designed to maintain correct answers Constant evaporator pressure The thermostatic expansion valve has three operating pressures correct answers Evaporator pressure, Spring pressure, and Sensor bulb pressure When mounting a thermostatic expansion valve sensor bulb, which of the following is not true correct answers It must be installed lower than the valve body