This textbook attempts to cover all the topics concerning fluid Mechanics, Hydraulics and Hydraulic Machines, keeping in view the requirements of undergraduate engineering students of all branches. Beginning with fundamentals, advanced topics are discussed towards the end of each chapter. This book written in SI System of units should be a single guiding reference material for most university examinations, AMIE and other competitive examinations. While dealing with various aspects, emphasis is on showing a physical picture of the situation with the help of diagrams.