To be eligible for the B.Tech degree program at Bharathidasan Engineering College in Vellore, candidates must have completed their 10+2 education with a minimum aggregate of 50% in Physics, Chemistry, and Mathematics. Additionally, candidates must have a valid score in entrance exams such as JEE Main or TNEA. It is also important for candidates to meet the age criteria set by the college. Meeting these eligibility criteria will ensure that students have the necessary academic background and skills to succeed in the rigorous B.Tech program at Bharathidasan Engineering College.