This document outlines the scheme and syllabus for the Bachelor of Technology in Mechanical Engineering program at Punjab Technical University for the 2011 batch. It provides details of the courses offered in the third semester, including course codes, titles, credits, and brief descriptions. Some of the key courses covered in the third semester include Strength of Materials, Theory of Machines, Machine Drawing, Applied Thermodynamics, and Manufacturing Processes. The document also lists the assessment structure, distribution of marks, and contact hours for each course.