Welcome to the challenging and exciting world of engineering! This book has been written to help get you through six specialist units of the revised BTEC National Certificate and Diploma awards in Engineering. It provides the essential underpinning knowledge required of a student who wishes to pursue a career in engineering. The book has been written by a highly experienced further education lecturer, who has over 30 years of practical teaching experience, with contributions from specialist lecturers in Engineering Design and Pneumatics and Hydraulics. Throughout the book I have adopted a common format and approach with numerous student activities, examples, end of chapter review questions and key points.