The mechanical efficiency of a single cylinder four-stroke engine is 80%. The frictional power is estimated to be 25. Calculate the indicated and brake power developed by the engine. - PrepBharat

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The mechanical efficiency of a single cylinder four-stroke engine is 80%. The frictional power is estimated to be 25. Calculate the indicated and brake power developed by the engine.

a) 106 kW;120 kW
b) 125 kW;100 kW
c) 120 kW;106 kW
d) 100 kW;125 kW

Answer: b
Explanation: brake power/indicated power = 0.8
Indicated power-brake power = 25
Indicated power-0.8*indicated power
Indicated power = 125 kW
Brake power=100 Kw.

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