This book has been specially written for the second year students of engineering colleges affiliated to various Technical Universities. The subject matter has been presented in detail, in a simple form with clarity so as to enable students of varied background to understand the subject with little effort. An attempt has been made to explain the theory through illustrations, diagrams and examples for understanding the concepts involved keeping in mind the different levels of intelligence of students. Salient Features · A good number of solved examples along with a large number of graded problems in the exercises are provided under each topic and as well at the end of each chapter for practice · A set of objective type questions are given in the last pages of the chapters for the convenience of students preparing for the examinations. · A summary of important formulae and working rules for solving problems is given at the end of most of the chapters· Number of solved questions of previous years are added after each chapter