Diploma 4th Sem Civil Engineering Books PDF: The Directorate of Technical Education (DOTE), Government of Tamil Nadu is responsible for Technical Education and Training in Tamil Nadu. Dote Tamilnadu conducts polytechnic college/ Diploma counseling, Exam, and Training. TN Polytechnic Book is available online in PDF on the official website: www.tndte.gov.in (m scheme books). TN 4th Semest...