This is an extension of the first edition of this book as well as it is also an extension of this author's publications Industrial and Occupational Health, Second Edition and Occupational Health and Hygiene in Industry which describe occupational health, hygiene and industrial safety related topics in details. Several long- and short-duration undergraduate and postgraduate courses on occupational health, industrial hygiene and safety are available these days. All these courses are multidisciplinary, comprehensive and deal with occupational health, industrial hygiene, industrial safety, industrial psychology, human physiology and ergonomics, staff training and productivity, etc. Many of these courses follow multiple choice question methodology for both entrance and exit examinations because of their wide range of coverage and being easy to evaluate through artificial intelligence (AI). This book contains 11 parts and each part contains 500 questions and their answers separately. Therefore, the book has a total number of 5500 questions and their answers. The book will serve as a boon for the students yearning to qualify for courses such as Associate Fellow of Industrial Health (AFIH) recognized by DGFASLI, Government of India; Postgraduate/Advance Diploma in Industrial Safety (PDIS/ADIS) recognized by respective state governments; and professional courses for supervisors engaged in hazardous industries, which is a statutory requirement in hazardous industries. Even the medical graduates appearing for PG NEET examination will get substantial help from this book.