This book on Thermal Engineering covers a wide range of topics, starting from fundamentals of thermodynamics and finishing with thermal engineering applications. It has been written exhaustively to meet the requirements of the syllabi of different universities in this subject for courses of undergraduate students of mechanical, automobile, aeronautical, chemical engineering as well as AMIE (India) Section-B, U.P.S.C. and Indian Engineering Services examinations. The subject is presented in 33 chapters, with each chapter containing review questions at the end. Consistent use of SI units is maintained throughout the book.