Very good it was pure technical asked questions on electrical machines.
Mostly prepare for area where your expertise are.
Also prepare for HR related questions. Location of bhel offices should be known
I interviewed at Bharat Heavy Electricals (New Delhi)
Interview
Interview are not very hard nor very easy. They are somewhat in order mix
1. Cut-off from gate or lateral entry after specific experience.
2. Age limit.
3. Minimum work experience of 10 years.
I applied in-person. I interviewed at Bharat Heavy Electricals (Chennai) in Jan 2019
Interview
a panel of executives taking several rounds of questions both technically and hr based. aptitude was checked along with tendency to take risks and complete the assigned job tasks. it lasted about 30 min