The Book is based on latest syllabus as per NSQF Level-3 of DGT. The book is for ITI Students of Mechanic Diesel Trade. It covers the theory part of Mechanic Diesel trade for 1 year. The book is based upon latest exam pattern of NIMI & DGT. It covers entire syllabus with simple language and comprehensive examples. The book is in English language and also includes previous 10 years paper?s questions & answers so that the students can have a better preparation for exam. This book is comprised with various types of questions which include MCQs, Fill in the blanks, match the columns, short and long answer type questions. In this book the theory has been explained with the help of neat and clean diagrams, flow charts and various tables. It also covers more than 1100 Questions. This book is also helpful for various competitive exams like Assistant Loco pilot ? Railways, Training Officer and Junior Instructor etc. This book will help the students to clear various interviews of technical companies related to Mechanic Diesel trade.