can instrumentation and control engineer apply for the post of electrical or electronics engineering job?
Please tell which particular PSU you are asking for?
And you need to check first what are the eligible disciplines (branches) to apply for any of the PSUs. So below I am providing you the link which you can go through to know about the same -
http://www.engineering.careers360.com/articles/psu-recruitment-through-gate-2017
Good Luck!!!