engineering recuitment UPCL AE (E&M) 2021 Mock Test Internal Combustion Engine Fuels and Combustion Stoichiometric Air Fuel Ratio
Decrease of air-fuel ratio in spark ignition engines results in
1
increase of NOx
2
a decrease of CO and unburnt hydrocarbon
3
an increase of CO and unburnt hydrocarbon
4
none of the above