Automobile Engineering in ME
The heat transfer from coolant to air in the radiator of an automobile engine takes place by

Radiation only
Conduction, convection and radiation
Convection and radiation
Convention only

ANSWER DOWNLOAD EXAMIANS APP

Automobile Engineering in ME
The compression ratio in petrol engine is kept less than in Diesel engine because

Less compression ratio gives better performance
It makes petrol engines lighter
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
It is just customary to have less compression ratio in petrol engines

ANSWER DOWNLOAD EXAMIANS APP