Title: Apply exhaust system theory, 4-cycle engine.
Course: Basic Small Engine Repair (20109) > Section: Diagnosing and Servicing Exhaust Systems

Application should include engine cooling, back pressure, noise pollution, scavenging, emissions, and blower effect.

Process/Skill Questions:

- Why is a muffler necessary? What is its function?
- What is back pressure?
- Why should exhaust be carrried away from the engine?