This book is intended to serve as a comprehensive guide to sensors and their applications, focusing on multiple choice questions to test the reader's knowledge and understanding of the subject matter. The book covers a broad range of topics related to sensors, including various types of sensors, sensing principles, sensor characteristics, sensor networks, and sensor applications in various industries.The book is organized into chapters, each of which focuses on a specific topic or theme related to sensors. Each chapter consists of a set of multiple choice questions that cover the key concepts and principles related to the topic, along with detailed explanations and references to help the reader better understand the material.We hope that this book will be a valuable resource for individuals seeking to enhance their knowledge and understanding of sensors, and we welcome feedback and suggestions for future editions.