Correct option is A
The
mean effective pressure (MEP) is defined as the ratio of the net work done during one cycle of an engine to the displacement volume of the engine. Mathematically, it is expressed as:
MEP = Net Work Done/Displacement Volume
It is a useful parameter in analyzing and comparing engine performance because it normalizes work output relative to engine size.
· MEP is measured in units of pressure, typically kPa or bar.
· It can be indicated (IMEP) or brake (BMEP), depending on whether friction losses are accounted for.
· A higher MEP indicates better engine performance.
· Displacement volume is the volume swept by all the pistons in the engine.
· MEP is directly related to power output.
· It helps compare engines of different sizes or types.
