Title: Explain exhaust system theory of a four-stroke engine.
Course: Small Engine Technology I (20110-I) > Section: Servicing Exhaust Systems

Explanation should include

- engine cooling
- back pressure
- noise pollution
- scavenging
- emissions
- blower effect.

Process/Skill Questions:

- Why is a muffler necessary? What is its function?
- What is back pressure?
- Why should exhaust be carried away from the engine?
- How does the exhaust system function on a four-stroke engine?