Hi Dipanshu.

That depends on the college you're interested. In the case of IIT or NIT, you need to score a high mark to get admission for CE, and any other course. In the case of other colleges which admits students on the basis of JEE main score, you won't need a high score, but around 70 or 80 may be required. it can go low upto 40 or 30, depending upon the college. Some colleges have a minimum required marks, while some don't. So, please check the website of the college that you're interested in to know the exact details.