If a diesel engine has a thermal efficiency of 35%, what percentage of the heat energy of the fuel is discharged as rejected heat?
A) 35%
B) 65%
C) Half of 35%
D) Half of 65%

Question

Quizplus · Accepted Answer

The thermal efficiency of an engine is the percentage of heat energy converted into work, so if a diesel engine has a thermal efficiency of 35%, it means 35% of the heat energy is used for work, and the rest, which is 100% - 35% = 65%, is discharged as rejected heat.

If a Diesel Engine Has a Thermal Efficiency of 35