The cut-off differs from state to state. You didn't mentioned which state you want to know about. Every state conducts different entrance examinations for polytechnic exams like JEXPO in west bengal etc.

So I would like you to recommend to get back to career360.com (//career360.com) with more specifics so that we can avail you the info you really needed.

I hope my answer helps you. All the very best for your future endeavors!