ASE A7 Domain 1: HVAC and Engine Cooling System Service, Diagnosis, and Repair Welcome to your ASE A7 Domain 1: HVAC and Engine Cooling System Service, Diagnosis, and Repair 1. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair When diagnosing an HVAC system with poor cooling performance, what is the primary component to check? A. Engine coolant temperature sensor B. Blower motor resistor C. Cabin air filter D. Refrigerant level None 2. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What is the primary function of the HVAC system's evaporator? A. To cool the engine B. To remove heat from the cabin air C. To heat the cabin air D. To filter the cabin air None 3. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What could be a likely cause if the heater in a vehicle's HVAC system is blowing cold air instead of hot air? A. Faulty thermostat B. Low engine oil level C. Faulty cabin air filter D. Blocked heater core None 4. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair Which component of the HVAC system is responsible for regulating the temperature of the air entering the passenger compartment? A. Cabin air filter B. Blower motor resistor C. Heater control valve D. Evaporator None 5. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair If a vehicle's engine cooling system is losing coolant without any visible leaks, what should be checked first? A. Radiator cap B. Thermostat C. Water pump D. Heater core None 6. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What component in the HVAC system is responsible for regulating the blower motor speed? A. Cabin air filter B. Heater control valve C. Blower motor resistor D. Evaporator None 7. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair Which of the following is a common refrigerant used in automotive air conditioning systems? A. Nitrogen B. Oxygen C. R-134a D. Carbon dioxide (CO2) None 8. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair In the HVAC system, what component is responsible for directing airflow to different vents, such as the defrost, floor, or dash vents? A. Blower motor resistor B. Cabin air filter C. Mode door actuator D. Evaporator None 9. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What is the primary function of the thermostat in an engine cooling system? A. To regulate the blower motor speed B. To control the refrigerant level C. To maintain the engine operating temperature D. To filter the cabin air None 10. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What component in the HVAC system helps filter and purify the air entering the passenger compartment? A. Blower motor resistor B. Mode door actuator C. Cabin air filter D. Evaporator None 11. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair When diagnosing an HVAC system that blows air with an unusual odor, what is a common cause to check? A. Clogged cabin air filter B. Faulty blower motor resistor C. Low refrigerant level D. Blocked evaporator None 12. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What is the primary function of the radiator in an engine cooling system? A. To remove heat from the engine B. To control the refrigerant level C. To direct airflow in the HVAC system D. To filter the cabin air None 13. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair In an HVAC system, what component is responsible for regulating the flow of refrigerant and changing its state from a high-pressure gas to a low-pressure liquid? A. Compressor B. Condenser C. Evaporator D. Expansion valve None 14. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What is the purpose of the blower motor in an HVAC system? A. To control the refrigerant level B. To direct airflow to different vents C. To remove heat from the engine D. To circulate air inside the cabin None 15. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What component in the HVAC system is responsible for removing moisture from the cabin air? A. Mode door actuator B. Cabin air filter C. Heater control valve D. Dehumidifier None 16. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair Which component in the HVAC system is responsible for converting refrigerant from a gas to a liquid? A. Condenser B. Compressor C. Evaporator D. Expansion valve None 17. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair In the HVAC system, what is the purpose of the heater core? A. To filter the cabin air B. To regulate blower motor speed C. To remove heat from the engine D. To direct airflow to different vents None 18. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair What is the purpose of the compressor in an automotive A/C system? A. To control the refrigerant level B. To circulate engine coolant C. To remove moisture from the cabin air D. To pressurize and circulate refrigerant None 19. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair In an HVAC system, what component is responsible for changing the direction of airflow (e.g., from defrost to dash vents)? A. Cabin air filter B. Blower motor C. Mode door actuator D. Expansion valve None 20. ASE A7: HVAC and Engine Cooling System Service Diagnosis and Repair Which of the following components in the HVAC system is responsible for adjusting the temperature of the air entering the passenger compartment? A. Heater core B. Condenser C. Compressor D. Cabin air filter None 1 out of 20 Time is Up! Time's up
