MATRIX is the most popular name among the engineering students. This is a single book which contains all subjects for Mechanical Engg. 3rd Year 5th Semester, consists more than 10 years of Polytechnic question-answers. Each subject is organised chapter wise, according to Polytechnic syllabus and every chapter contains the Polytechnic questions with solutions, year wise in sequencial order. It is a real helpful guide for examination purpose. Students will get weightage of the chapters and will be more focused.