Diesel Technology Online Textbook - Table of Contents

Activities Support

Review Questions—Chapter 13

Answer the following questions using the information provided in this chapter.

1. Define the term exhaust back pressure.
   
2. Even a well-designed muffler will produce some _______ in the exhaust system.
   
3. In wet mufflers used in marine applications, the _______ contact the cooling water.
   
4. A turbocharger _______ the engine’s exhaust emissions, smoke, and noise.
   
5. Which of the following is an advantage of a turbocharged engine?
     A. Decreased emissions. B. Better fuel economy. C. Increased power output. D. All of the above.
6. A turbocharger automatically compensates for the normal loss of _______ and _______ at higher altitudes.
   
7. Charge air coolers cool the compressed air from the turbocharger using _______.
     A. engine coolant B. cool outside air C. Both A & B. D. oil from the engine
8. Briefly describe the purpose of an exhaust engine brake.
   
9. At higher engine operating temperatures _______.
     A. fewer solid particulates and more NOₓ gases are produced B. more solid particulates and fewer NOₓ gases are produced C. fewer solid particulates and NOₓ gases are produced D. more solid particulates and NOₓ gases are produced
10. A(n) _______ provides simultaneous reduction of diesel engine exhaust emissions and noise.
    

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