Two engines are identical except that engine A is two years old and engine B is new.If engine A does 15% less work than engine B under identical operating conditions,what is the ratio of the efficiencies of the two engines,eA/eB?

Question

Quizplus · Accepted Answer

Let's assume that engine B has an efficiency of 100%. Since engine A does 15% less work, its efficiency must be 85% (100% - 15%). Therefore, the ratio of the efficiencies of the two engines is eA/eB = 85%/100% = 0.85.

Two Engines Are Identical Except That Engine a Is Two