This book will be useful for engineering exams, state services exams, and job placements in public utilities such as the NTPC, NHPC, BPCL, BSNL, DMRC, HAL, IOCL, SAIL, NPCL, DRDO, etc. There are a number of topics covered that a student should be aware of before appearing for any such exam. The syllabus coverage is according to the latest trend. Previous years' questions are presented along with their solutions. A lucid style has been used in the theoretical part for easy comprehension of the readers. After each unit, the students are provided with a practice set. As a whole, the book is informative and impressive at the same time.