what to do if failed in +2(non-medical). and i got 3397th rank in j.e.t. and my interest is towards mechanical(diploma). need sugestion.

aplly through nios

For admission in engineering passing of +2 is essential. You can opt polytechnic diploma 0n the basis of 10th also. But in my opinion do +2 and than take admission in B.Tech it will be better for you