SURA'S TNUSRB Sub-Inspector (SI) Technical Exam Book (Diploma Standard) in English Medium – Latest Updated Edition 2026 is a complete preparation guide for aspirants appearing for the Tamil Nadu Uniformed Services Recruitment Board Sub-Inspector Technical Examination. The book provides detailed coverage of Diploma-level Technical Subjects, Engineering Fundamentals, Technical Aptitude, General Awareness, Logical Reasoning, and important exam-related concepts with clear and structured explanations. It includes previous year question papers, model questions, practice exercises, technical problem-solving sections, detailed answers, and exam preparation tips to help candidates strengthen their technical knowledge, improve accuracy, and confidently face the TNUSRB SI Technical Examination 2026.amination.