hi,

the number of employees recruiting through gate in psu is different for different stream. all through most of the companies hires electrical, mechanical, civil. some psus has vacancy for other streams as well. the top most recruiter for psu's for all india is power grid corporation, ntpc, iocl, ongc, posoco etc. last year air port authority of india also recruit al most total of 50 electrical engineers. so the total number is you can expect 200-300 number of seats . after the gate result declared some state government vacancies also arrived through gate exam.