Question

The hypothetical pressure which is thought to be acting on the piston throughout the power stroke is called ____________

(a) brake power

(b) indicated power

(c) mean effective pressure

(d) none of the mentioned

I got this question by my college professor while I was bunking the class.

I'd like to ask this question from Engine Power in section Measurements and Testing/Performance Parameters and Characteristics of IC Engine

Answer 1

The correct answer is:

(c) mean effective pressure

Explanation:

Mean effective pressure (MEP) is a hypothetical or average pressure that is assumed to act on the piston during the power stroke in an engine. It is used to calculate the engine's power output and is considered a useful measure of the engine's efficiency and performance. It is not the actual pressure at any specific point but an average value over the entire power stroke.