This study material covers theory, solved numerical problems, boiler drawing and MCQs from central and state boiler board exams (2017 - till date). The book covers the following topics: Boiler Act 1923/2024 and IBR 1950, Properties of Steam Fuels, Combustion and Flue Gases, Types of Boilers, Boiler Mountings and Accessories, Boiler Operation, Control and Instrumentation, Feedwater Chemistry and Treatment, Boiler Materials, Boiler Mechanics, Boiler Welding, Solved Numerical problems and MCQs from BOE exams.