# Indicating power of four-stroke Engine is expressed as

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Indicating power of four-stroke Engine is expressed as

1. PLAN
2. 2PLAN
3. PLAN/2
4. 4PLAN

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Correct Answer - Option 3 : PLAN/2

Concept:

Indicated Power for four-stroke engine is given by,

$I.P.~=~\frac{PLAN}{ 2}$

where P = mean effective pressure in N/m2, L = stroke length in m, A = Area of cross-section of the cylinder in m2, N = rpm of the engine crankshaft

$η_m~=~\frac{B.P.}{I.P.}$

where ηm = mechanical efficiency, B.P. = brake power, I.P. = Indicated power