Hello Mudit Shukla , There are two eligibility are for admission in IET LUCKNOW  first is 45% in 10+2 and Upsee minimum qualifying percentage for General,OBC,ST are 25% and for SC is 20%.

And I found some data about the rank of UPSEE for civil engineering in that college are :
General - 1400 approx

And if you are from another cast then mention that.

Hope it will be helpful for you :)