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2 Which of the following is not part of a rear air-conditioning system? A. Rear AC compressor B. Rear evaporator C. Rear blower motor D. Rear heater core 3 Clear water is observed dripping out from beneath the vehicle. Technician A says that’s normal. Technician B says that the evaporator housing is defective and should be replaced. Which technician is correct? A. Technician B B. Neither Technicians A nor B C. Both Technicians A and B D. Technician A 4 Two technicians are describing how an air-conditioning system gets rid of the heat. Technician A says that heat always flows from the hotter to the colder object. Technician B says that as a refrigerant evaporates, it absorbs heat as it changes from a liquid to a gas. Who is correct? A. Neither Technician A nor B B. Technician A only C. Technician B only D. Both Technicians A and B 5 Technician A says that cabin filters are accessible behind the glove compartment. Technician B says that cabin filters are accessible from under the hood. Who is correct? A. Technician B only B. Technician A only C. Both Technicians A and B D. Neither Technician A nor B 6 The production and cleanliness standards for recycled R-12 were established by the A. Society of Automotive Engineers. B. Clean Air Act. C. Mobile Air-Conditioning Society. D. Geneva Convention. 7 Technician A says that the HVAC doors in an automatic system are vacuum-operated. Technician B says that the HVAC doors in an automatic system are operated by electric servos. Who is correct? A. Technician A B. Neither Technicians A nor B C. Technician B D. Both Technicians A and B 8The compressor in an AC system is least likely needed to A. lower the gas pressure. B. keep refrigerant circulating. C. make gas hotter than ambient air. D. increase the gas pressure. 9 Compressing a vapor A. increases the pressure and decreases the temperature. B. increases the pressure and increases the temperature. C. decreases the pressure and decreases the temperature. D. decreases the pressure and increases the temperature. 10 Which sensor might use an aspirator tube? A. Evaporator outlet temperature B. Inside vehicle temperature C. Outside air temperature D. Discharge air temperature 11 Two technicians are discussing retrofitting CFC-12 systems to HFC-134a standards. Technician A says that the process doesn’t take long but that mineral oil must be added before the retrofit is complete. Technician B says that 50 ounces of CFC-12 should be replaced with 50 ounces of HFC-134a. Who is correct? A. Technician A B. Technician B C. Both Technicians A and B D. Neither Technician A nor B 12A quick way to check the evaporator for leaks is to remove the A. upper radiator hose. B. compressor. C. blower motor resistor pack. D. orifice tube system. 13 When replacing an air-conditioning component, all of the following regarding refrigerant oil are true except: A. The oil removed during refrigerant recovery should be measured. B. The old oil should be replaced with fresh oil. C. The old oil should be drained from the component and measured. D. The oil charge stamped on the compressor should be added to the system. 14The ambient temperature is 70° and the humidity is low. With the AC on, what should the high-side gauge pressure be? A. 300 to 350 PSI B. Not enough information is given. C. 10 to 50 PSI D. 140 to 190 PSI 15 When replacing a compressor clutch, what’s the critical measurement? A. Air gap B. Refrigerant C. Voltage drop D. Current draw 16 Which of the following must always be replaced when a retrofit is performed? A. Condenser B. Compressor C. Expansion valve D. Refrigerant oil