Hello aspirant,

Yes you can give RRB JE Mechanical as you belong to Marine Engineering.

Age limit for varies posts under Unreserved Category are given below. Relaxation is given for reservation category candidates.

General: 18 - 33 years

OBC: 1 8 - 36 years

SC/ST: 18 - 38 years

Fitness Certificate is required

Ca ndidates must have completed Graduation in Engineering from a recognised College or University.

Visit below mentioned link to get more information about Eligibility Criteria of RR JEE exam use below given link.

https://competition.careers360.com/articles/rrb-je-eligibility-criteria

I hope this information was useful to you.

Good Luck!!