Q:

A diesel engine is usually more efficient than a spark ignition engine because ___________

A) Diesel being a heavier hydrocarbon, release more heat per kg than gasoline B) The air standard efficiency of diesel engine is higher than the otto cycle, at a fixed compression ratio
C) The compression ratio of diesel engine is higher than petrol engine D) Self ignition temperature of diesel engine is higher than that of gasoline
 

View Answer Explanation

108