Hello student,

Each state has a State Council for Technical Education and Vocational Training. Basically these councils of each and every state conducts entrance examination for this state polytechnic admission process or admission to diploma courses.like For West Bengal it is called JEXPO.

Basically for most of the state you should have minimum 35% marks in your 10th level examination from any government recognised boards.

Actually you have not mentioned about which state you are talking about that's why it is quite difficult for us to tell about that. However you can go to the link below to know more

https://engineering.careers360.com/articles/polytechnic