* Fully updated throughout to cover all the Technical Certificate Diploma requirements & all the underpinning key knowledge for the NVQ. * Material on energy efficiency & sustainability is included saving hours of research time. * Straightforward language ensures that even the most technical concepts are accessible & a glossary of terms & updated end-of-unit knowledge checks enable students to track their progress at the end of each chapter. * Exam style multiple-choice assessment questions provide extra support for revision & exam preparation.