In this edition many changes are made, as per the requirements of the university syllabus. In some chapters, certain topics are repeated to have continuity, for convenience of readers, so that students can prepare chapter wise. New topics have been added as per the changes made in the syllabus of some universities.Salient features: For every chapter, the topics covered are listed and scope is given under the caption "In this chapter". Objective type questions with answers and essay type questions are also given for every chapter. This will enable students to prepare for examinations very well. This textbook will also be very useful for preparing for competitive examinations like Engineering services exam,