An automobile engine operates with an overall efficiency of 12%. How much energy is delivered as waste heat (in litres of petrol) for each 10 litres of petrol burned?
A)1.2
B)8.8
C)6.5
D)4.7
E)7.5

Question

Quizplus · Accepted Answer

If the engine operates with an efficiency of 12%, it means 12% of the energy from the petrol is converted into useful work, and the remaining 88% is waste heat. Therefore, for every 10 litres of petrol burned, 8.8 litres are delivered as waste heat.

An Automobile Engine Operates with an Overall Efficiency of 12