Fluid Mechanics is a comprehensive book for undergraduate mechanical, civil, automobile and aerospace engineers. The book is intended for an introductory, single semester course on fluid mechanics and teaches students how fluids behave. It discusses how fluids are classified and what differentiates liquids from gases. The book covers the laws of fluid motion, and Bernoulli’s principle. It helps students understand how fluid pressure is used to design water systems and discusses a number of problems in these areas. It helps students acquire the understanding they need to study more complicated courses in the future, discussing Fluid Statics, Fluid Kinematics, and Fluid Dynamics. The book helps students learn topics such as the Navier-Stokes equations, Newtonian theory of Viscosity and Archimedes’ Principle. In addition, students will understand how surface tension is important and how capillary action occurs. The problems are given lucid and detailed explanations, for students to understand how to apply the concepts in the book in a real world scenario. The book is an indispensable resource for all GATE aspirants.