Hey aditya,

SRM University is ranked as Top  most private university in India.

It is ranked at No.46 private university by NIRF MHRD Government of India 2018 because it has well equipped labs,infrastructure, faculty,facilities,administration, research and development too! 

For your marks you have less chances to get admission in SRM  University! And even you can get a seat in CIVIL   in SRM university at main campus!

no, there is no improvement exam for SRMJEEE For more details and rank cutoff  you can go through following website link which may help you,

Http://www.engineering.careers360.com/articles/srmjeee-cutoff

All the best!