Question

The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The m.e.p. is maximum in the zone of ____________

(a) lean mixture

(b) chemically correct mixture

(c) rich mixture

(d) none of the mentioned

I have been asked this question in examination.

My doubt is from Air Fuel Mixtures in chapter Carburetion of IC Engine

Answer 1

Right option is (c) rich mixture

To explain: The m.e.p. is maximum in the zone of rich mixture.