This sample book is a comprehensive guide to Instrumentation and Control Engineering, designed for students, job seekers, and professionals preparing for interviews and competitive exams. Packed with carefully selected multiple-choice questions (MCQs), it covers essential topics such as PID controllers, pressure transmitters, control valves, actuators, sensors, and process control systems. Each question is followed by the correct answer, making it easy to test your knowledge and strengthen your understanding of core concepts. Whether you are brushing up on the basics of proportional, integral, and derivative control, learning about thermocouples and signal measurement, or mastering advanced control strategies, this book serves as a reliable resource. With its clear structure and practical approach, it is ideal for self-study, classroom use, or quick revision before interviews. A must-have for anyone aiming to excel in industrial automation, instrumentation, and control engineering.