Yeah! You can apply for the Non-technical examination for RRB but you can't apply for the technical examination because RRB releases vacancies in the technical staff mostly for Mechanical Engineering, Civil Engineering, Electrical Engineering, IT/CSE and ECE. There are no such requirement of Food technologist in RRB (at least there are no notification for that).

To know more about RRB NTPC visit the link below:

https://competition.careers360.com/exams/rrb-ntpc

I hope this answer helps. All the very best for your future endeavors!