It is 2-tier interview. After a general introduction with the HR, there will be a technical round - after clearing this there will be a management round.
The process is not much hectic. If candidate is suitable the company will hire the candidate to a site location.
Interview questions [1]
Question 1
1) Qualification
2) waste water knowledge
3) Different stages of waste water treatment.
4) What is coagulation and flocculation.
I applied through college or university. I interviewed at BioPetroClean (New Delhi) in Dec 2025
Interview
It was good. Very friendly interviewer. Asked questions about wastewater treatment plant and all were easy. And after that once selected they tell you all the further processes.Just learn about Wastewater treatment plant. Each and every thing and be confident.