This is a desk book focusing on Boiler Operation Engineering (BOE) for Power Plant Engineers. This has been written by an experienced professional with an all-round techno commercial background. There are a lot of details provided in this book through explanations, charts, graphs, guidelines, and comparisons, which are needed by a reader. To make referencing easy, such data are collated and presented as lists of references and useful data in the front matter and appendices that definitely add to the utility of this book for beginners as well as the experienced. In fact, this book should be of interest to any engineer in the field of thermal power who wants to click Boiler Operation Engineering (BOE)/ 1st class and 2nd class Boiler Attendants' (viva)/ Energy Manager - Auditor Proficiency Examination. Hence, all previously asked MPC Q&A of different State Boiler Boards, Energy Auditors/ Managers, etc. are placed with their answers, this book will surely a confident step for the examination appearing engineers as well as boiler operators too. Engineers in lower and middle management levels and who still must battle with technicalities and management issues should find this volume particularly interesting and directly useful.