ASE A8 Domain 4: Emissions Control Systems Diagnosis and Repair Welcome to your ASE A8 Domain 4: Emissions Control Systems Diagnosis and Repair 1. ASE A8: Emissions Control Systems Diagnosis and Repair In a positive crankcase ventilation (PCV) system, what is the primary purpose of the PCV valve? A. To control fuel injection B. To reduce exhaust emissions C. To prevent engine overheating D. To maintain proper crankcase pressure and reduce emissions None 2. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control system is responsible for reducing nitrogen oxides (NOx) emissions in a gasoline engine? A. PCV system B. EGR system C. EVAP system D. Secondary air injection system None 3. ASE A8: Emissions Control Systems Diagnosis and Repair In an evaporative emission control system (EVAP), what is the purpose of the charcoal canister? A. To store excess engine coolant B. To filter engine oil C. To store and absorb fuel vapors D. To regulate fuel pressure None 4. ASE A8: Emissions Control Systems Diagnosis and Repair What is the primary function of the oxygen sensor (O2 sensor) in the emissions control system? A. To measure fuel pressure B. To regulate engine coolant flow C. To monitor exhaust gas temperature D. To measure the oxygen content in exhaust gases None 5. ASE A8: Emissions Control Systems Diagnosis and Repair In a modern vehicle, which emission control system is responsible for monitoring the operation of the catalytic converter? A. PCV system B. EGR system C. OBD system D. EVAP system None 6. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control component reduces nitrogen oxides (NOx) emissions by injecting a fine mist of water or a water-urea solution into the exhaust system? A. PCV valve B. EGR valve C. Catalytic converter D. SCR (Selective Catalytic Reduction) system None 7. ASE A8: Emissions Control Systems Diagnosis and Repair What is the primary function of the fuel tank pressure (FTP) sensor in the evaporative emission control system (EVAP)? A. To control engine timing B. To measure fuel pressure C. To monitor the pressure inside the fuel tank D. To regulate fuel injector pulse width None 8. ASE A8: Emissions Control Systems Diagnosis and Repair In an exhaust gas recirculation (EGR) system, what is the purpose of the EGR cooler? A. To reduce engine coolant temperature B. To improve fuel efficiency C. To cool the recirculated exhaust gases D. To enhance exhaust sound None 9. ASE A8: Emissions Control Systems Diagnosis and Repair What is the purpose of the positive crankcase ventilation (PCV) system in the emissions control system? A. To reduce engine noise B. To increase engine horsepower C. To maintain proper crankcase pressure and reduce emissions D. To improve fuel efficiency None 10. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control system is responsible for reducing carbon monoxide (CO) emissions by injecting additional air into the exhaust system? A. EVAP system B. EGR system C. Secondary air injection system D. OBD system None 11. ASE A8: Emissions Control Systems Diagnosis and Repair In an evaporative emission control system (EVAP), what is the primary function of the canister purge valve? A. To regulate fuel pressure B. To store and absorb fuel vapors C. To control engine timing D. To control coolant flow None 12. ASE A8: Emissions Control Systems Diagnosis and Repair What is the purpose of the catalytic converter in the emissions control system? A. To reduce nitrogen oxide (NOx) emissions B. To regulate engine coolant flow C. To store excess engine oil D. To increase engine horsepower None 13. ASE A8: Emissions Control Systems Diagnosis and Repair In an evaporative emission control system (EVAP), what is the primary purpose of the fuel tank pressure (FTP) sensor? A. To measure fuel pressure B. To control engine timing C. To monitor the pressure inside the fuel tank D. To regulate fuel injector pulse width None 14. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control system uses a catalytic converter and an air injection system to reduce emissions during cold engine startup? A. EGR system B. OBD system C. PCV system D. Secondary air injection system None 15. ASE A8: Emissions Control Systems Diagnosis and Repair What is the primary function of the oxygen sensor (O2 sensor) in the emissions control system? A. To measure engine coolant temperature B. To measure air pressure C. To measure the oxygen content in exhaust gases D. To control fuel injection None 16. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control system is responsible for reducing evaporative emissions by capturing and storing fuel vapors? A. EGR system B. OBD system C. EVAP system D. PCV system None 17. ASE A8: Emissions Control Systems Diagnosis and Repair In an exhaust gas recirculation (EGR) system, what is the purpose of the EGR valve? A. To regulate engine coolant flow B. To reduce engine oil consumption C. To control fuel injector pulse width D. To control the flow of recirculated exhaust gases None 18. ASE A8: Emissions Control Systems Diagnosis and Repair In the evaporative emission control system (EVAP), what is the purpose of the charcoal canister? A. To store fuel vapors B. To regulate engine coolant flow C. To measure exhaust gas temperature D. To control fuel injector pulse width None 19. ASE A8: Emissions Control Systems Diagnosis and Repair Which emission control system reduces nitrogen oxide (NOx) emissions by injecting a fine mist of water into the combustion chamber? A. EVAP system B. EGR system C. Secondary air injection system D. Water injection system None 20. ASE A8: Emissions Control Systems Diagnosis and Repair What does the term "lean-burn engine" refer to in the context of emissions control systems? A. An engine running with too much fuel B. An engine running with an excessive air-to-fuel ratio C. An engine with high hydrocarbon emissions D. An engine with high carbon monoxide emissions None 1 out of 20 Time is Up! Time's up
