Even though most people think that a Diploma in Mechanical Engineering is a course that is exclusively for boys, but this is not the truth. Ladies can also pursue this course and become Mechanical Engineers. This course is a long course and students’ study for a minimum of 3 years after 10th grade. Diploma in Mechanical Engineering is the discipline of engineering that applies the principles of engineering, physics, materials science, and mathematics. In other words, it’s the branch of engineering that deals with the design, analysis, manufacturing, and maintenance of mechanical systems.