As you want to get the eligibility criteria of all PSU’s entrance exams in India so here is the information of the same for you:

Minimum Eligibility:
Candidates must have passed B.E. /B.Tech. /B.Sc. in Engg. Degree required

If you are a final-year students, the final result of 8th semester and mark-sheets must be presented at the time of interview.

Minimum required number varies for different PSUs companies generally,60%-70% for general and 50%-60% for the SC/ST/OBC/PH.

PSUs allow for two years gap.

Only candidates between 21 to 30 years are selected.

Three years of relaxation is offered to OBC.

No more than 5 years relaxation is granted to SC/ST.

It is important to appear for GATE exam before applying.

Some high profiled PSUs are:
HAL (Hindustan Aeronautics Limited) needs minimum 65% marks for General/ OBC and minimum of 55% Marks for SC/ST

HPCL(Hindustan Petroleum Corporation Limited) needs minimum 60% marks for General/ OBC and minimum of 50% Marks for SC/ST

NTPC(National Thermal Power Corporation ) needs minimum 60% marks for General/ OBC and minimum of 50% Marks for SC/ST

BHEL (Bharat Heavy Electricals Limited) needs minimum 60% marks in aggregate.

DRDO (Defence Research and Development Organization)

BSNL- JTO (Bharat Sanchar Nigam Ltd.- Junior Telecom. Officers)