Fundamentals of Engineering Thermodynamics 8th Edition

Published by Wiley
ISBN 10: 1118412931
ISBN 13: 978-1-11841-293-0

Chapter 5 - Checking Understanding - Page 277: 19

Answer

(d) friction.

Work Step by Step

The main component of internal irrversibility in gear box is friction. Lubricating oil doesnot react with gear box matrial i.e. there is no chemical reaction as such inside gear box and gear box does not contain any gas. So, no irreversibility due to gas.
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