Ese- 2021 Mechanical Engineering Objective book is designed to help aspiring engineers to strengthen their grasp and understanding of the concepts of the subject. The book approaches the subject in a very conceptual and coherent manner. It covers questions from last 26 years of ESE examinations. The answers and the explanations of the questions along with the formula and details are provided too. The illustrative and solved examples will facilitate easy mastering of the concepts and their applications.