First of all i wanna let you know that 83 percentile is really a very good percentage so Congratulations.
Now, in CET the only requirements are:

1 You must be an Indian citizen
2 For General category you must have 50% marks individually in Physics, chemistry, maths.
3 For SC, ST,OBC you require only 45% individually in Physics, chem, maths.

Hello,
Thanks for connecting to careers360.com .
The closing ranks in College of Engineering, Trivandrumre different for different fields.
1. For applied electronics-  3389 (2017)
2. For civil engineering- 1762 (2017)
3. For computer science engineering- 713 (2017)
4. For electrical and electronics-  1426 (2017)
5. For electronics and communication - 862 (2017)
6. For industrial engineering - 6076 (2017)
7. For mechanical engineering- 850 (2017)
8. For architecture- 64 (2017)
Hope this helps.....

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