i have done diploma in mechanical having 2 years of exprince can i apply for ias examination

for IAS exam candidate must be graduate and as per your information you are not graduate so you can not apply. Complete your graduation than think for IAS

no.

For eligibility to IAS exam is 10+2+3 and degree from any govt recognized college in any stream is must. Accordingly, diploma is not eligible and experience is not considered.