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

Question

Quizplus · Accepted Answer

The overall efficiency of 12% means that 12% of the energy from the fuel is converted into useful work, while the remaining 88% is wasted as heat. For every 10 gallons of fuel burned, 10 gallons * 88% = 8.8 gallons of fuel energy is wasted as heat.

An Automobile Engine Operates with an Overall Efficiency of 12