Here’s a ready-to-use post you can copy, adapt, or share. Mastering Mechanical Engineering: Why “Theory of Machines” by R.S. Khurmi is a Must-Have 🔧 Introduction If you’re a mechanical engineering student or preparing for competitive exams like GATE, IES, SSC JE, or state engineering exams , you’ve almost certainly heard of R.S. Khurmi’s Theory of Machines .