Engineering Board Exam Reviewer · Thermodynamics · easy

The thermal efficiency of a heat engine is defined as:

1. Heat input divided by net work output
2. Net work output divided by heat input
3. Heat rejected divided by heat input
4. Net work output divided by heat rejected

Answer

B. Net work output divided by heat input

Solution

= Wnet/QH = 1 - QL/QH.

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