Chapter 28 Exhaust Systems, Turbochargers & Superchargers Test

Student Name: ______Date: ______

Matching:

1. Match the Following with their definition: (1/2 mark each)

_____ Heat Shield A. U-bolt for connecting parts of the exhaust system

_____ Catalytic Converter B. Tubing that connects exhaust manifold to rest of system

_____ Intermediate pipe C. Chamber for damping out pressure pulsations.

_____ Hangers D. Carries exhaust from muffler to rear of car body

_____ Header pipe E. Connects cylinder head exhaust ports to header pipe

_____ Tailpipe F. Prevents heat from transferring into other objects

_____ Muffler Clamp G. Connects exhaust manifold to tailpipe

_____ Exhaust Manifold H. Device for removing pollutants from exhaust

_____ Muffler I. Pipe between catalytic converter and muffler

J. Connects exhaust system to underside of body

Multiple Choice: (one mark each)

1. Which of the following turbocharger parts passes through the center of the turbo housing? a. Turbo shaft b. Turbine wheel c. Bearing housing d. Compressor wheel 2. The device that forces hot exhaust gases to flow into the intake manifold to aid cold weather starting is called: a. Crossover pipe b. Bypass actuator c. Catalytic converter d. Exhaust manifold heat valve 3. An inoperative turbocharger waste gate can cause: a. High boost pressure b. Low boost pressure c. Detonation d. All of the above 4. A turbocharger was badly damaged because of excess bearing and shaft wear. Technician A says that a new unit should be installed and that oil pressure to the turbo should be checked. Engine oil should be changed after a short break-in period. Technician B says that the oil should be drained and all lines should be flushed before installing the new turbocharger. Oil pressure to the unit should also be checked. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 5. Which of the following is not a type of supercharger? a. Vane b. Gear c. Rotor d. Centrifugal 6. Each of these is a major part of the exhaust system except: a. Muffler b. Hangers c. Flyweights d. Header pipe 7. Which of the following connect the right and left side header pipes? a. Tailpipe b. Main pipe c. Intermediate pipe d. Crossover pipe 8. Which of these is used to reduce the amount of exhaust pollutants entering the atmosphere? a. Heat shields b. Catalytic converter c. Pyrex thermal packing d. Cylinder head exhaust ports 9. Which of the following limits the amount of boost pressure developed by the turbocharger? a. Diaphragm b. Waste gate c. Compressor d. Sealing rings 10. Technician A believes a turbocharged engine will need a higher compression ratio to withstand increase in horsepower. Technician B feels the engine will no longer need a knock sensor if horsepower is increased. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 11. Which of the following helps an on-board computer keep the ignition timing advanced as much as possible? a. Diaphragm b. Control rod c. Knock sensor d. All of the above 12. Vibration and noise in a turbo charging system is a result of: a. Damaged turbine b. Leaking shaft seals c. Inadequate boost pressure d. Any of the above 13. When installing a turbo, each of these is a rule to remember except: a. Check and flush oil lines b. Check and change engine oil c. Torque all fasteners to specifications d. Reuse good gaskets and seals

Fill in the Blank: (one mark per blank)

14. A turbocharger can operate at speeds of up to ______RPM. 15. ______refers to the short delay before the turbo develops sufficient ______.

True or False: (one mark each)

16. True or False – A waste gate limits the minimum amount of boost produced by the turbocharger.

17. True or False – A dual exhaust system is commonly used on small, high fuel economy engines?

18. True or False – A Blow-through turbo charger has the turbo located before the carburetor or throttle body.

19. True or False – A Draw-through turbo charger has the turbo located before the carburetor or throttle body.

Short Answer: (one mark each)

20. Define the term Exhaust back pressure. ______21. What could happen if the waste gate was stuck closed? ______22. When is exhaust system service commonly needed? ______Diagrams:

23. Match the following areas/parts with the diagram to the right. (1/2 mark each)

_____ Piston _____ Turbine housing _____ Compressor Wheel _____ Air in under atmospheric pressure _____ Bearing housing _____ Exhaust flow out of engine _____ Turbine spun by exhaust flow _____ Compressor housing _____ Turbo shaft _____ Exhaust gas enter exhaust system _____Boost pressure above atmospheric pressure

24. Below are three different types of Supercharger designs; match the correct picture with the correct design. ( you will only use 3 of the 4 choices) (one mark each) a. Centrifugal b. Rotor c. Vane d. Gear

______

TOTAL MARK /37