324 Auto Engine Repair Copyright by Goodheart-Willcox Co., Inc. Review Questions—Chapter 15 Answer the following questions using the information provided in this chapter. 1. The _____ system provides filtered fuel under pressure to the fuel metering system. It must also provide for storage of the fuel. 2. The three subsystems of the fuel system are the: (A) fuel supply system, fuel filtering system, and fuel metering system. (B) fuel filtering system, air supply system, and fuel metering system. (C) fuel supply system, air supply system, and fuel metering system. (D) fuel supply system, air supply system, and fuel filtering system. 3. What is the purpose of an electric fuel pump? 4. The _____ system removes dust and dirt from the air entering engine intake manifold. 5. The three types of electronic fuel injection are _____, _____, and _____ injection. 6. Which type of fuel injection injects fuel at a single point in the intake? 7. What is a fuel rail? 8. Describe the operation of a basic engine sensor. 9. OBD II is an acronym for _____. 10. What is a data link connector? 11. What is a scan tool? 12. List five types of information that can be requested from a scan tool. 13. An OBD II trouble code is an alphanumeric code consisting of _____. 14. For what is a noid light used? 15. What are the three sources of emissions from a vehicle? 16. List and describe the four types of vehicle emissions. 17. List six systems used to reduce emissions produced by the engine and its fuel system. 18. A PCV system uses vacuum to draw blowby gases out of the _____ for reburning in the combustion chambers of the engine. 19. If HC and CO emissions are higher than normal, what does this indicate about the air-fuel mixture? 20. List four things that blowby gases can cause. 21. What does the EVAP system do? 22. Which system injects burned exhaust gases into the engine intake manifold to lower the combustion temperature and reduce NO X pollution? (A) PCV system. (B) EVAP system. (C) EGR system. (D) computer system. 23. What is the purpose of the catalytic converter? 24. A(n) _____ is any substance that speeds a chemical reaction without itself being changed. 25. Most modern catalytic converters are _____ con- verters that can reduce HC, CO, and NO X emissions. ASE-Type Questions—Chapter 15 1. Technician A says that a vehicle’s fuel return system is used to regulate fuel pressure in a gasoline injection system. Technician B says that a vehicle’s fuel return system is used to cool the fuel and prevent vapor lock. Who is correct? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 2. Technician A says that a fuel filter can be located inside the fuel pump. Technician B says that a fuel filter can be located inside an injector body. Who is correct? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B.