Interviews is based on pipe line field and compressor. They are having compressor and dispensor and cgd network.
After that basic questions on mechanical engineering.
After that hobby and other stuff.
Then GD round and then HR round.
It Was not that strict asked basic question about myself and technical knowledge. They asked on which subject you are good in and asked related question about it and also help you understand the concept if don't get the answer.
Interview questions [1]
Question 1
Basic mechanical related question like Gear box and all.
Aptitude test followed by interview technical and human resource combined. It had a mix of questions of oil and gas sector and about background of the company, its operations and other general stuff