This Comprehensive PRACTICE BOOK is your complete guide for the RPSC Assistant Engineer (AEn) Main Examination in Mechanical Engineering. Spanning 250 pages, it covers the entire syllabus of Paper I and Paper II with topic-wise organized questions in 2 Marks, 5 Marks, and 20 Marks formats. Every question is solved step-by-step using the exact methodology demanded by the RPSC AEn exam, ensuring you understand both concepts and exam strategies. Ideal for civil engineering graduates seeking focused, exam-oriented preparation material that bridges theory and practical problem-solving.