General Studies · Exhaust System
What is meant by the term 'back pressure' in an automobile's engine exhaust system?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The atmospheric pressure of the fresh air entering the engine intake
- 2The combustion pressure remaining inside the engine cylinders during power stroke
- 3The resistance or opposition to the free flow of gases through the exhaust system✓
- 4The pressure created purely inside the muffler expansion chamber
Correct answer
The resistance or opposition to the free flow of gases through the exhaust system
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