From our research
What this interview looks like
Each PSU shortlists candidates on their GATE score in the relevant paper, in a ratio such as five to eight candidates per vacancy, and calls them to a personal interview, sometimes preceded by a group discussion or a short group task. The interview is typically 20 to 30 minutes before a panel of four to six: a general manager or executive director in the chair, a senior engineer from the discipline, an HR executive and often an external academic or a representative for reserved categories. The technical member usually starts from the final-year project and internship and moves to GATE-level fundamentals of the discipline with a plant or field twist. The HR and chair members probe why a PSU and why this company, willingness for all-India posting at remote plants, rigs, mines or project sites, the service bond and training year, other offers, and awareness of what the company does today. Weightage differs by company: GATE usually carries 75 to 85 per cent and the GD and interview together 15 to 25 per cent, while ONGC gives the interview a larger share. Final merit is GATE plus GD and PI, with a qualifying minimum in the interview for most companies. The ExamPilot mock compresses this into a 16-minute sitting: introduction, a six-minute discipline round, four minutes on fit and posting, two plant situations and a close, with the real panel's mix of English and Hindi.
How it is weighted
ONGC gives the interview the largest share among PSUs, roughly GATE 60 : interview 40. IOCL weights GATE around 85 with GD or group task and interview making up the remaining 15; GAIL uses GATE 75 : GD 10 : interview 15; HPCL and BPCL are GATE-dominant with GD and interview around 15. Most companies set a qualifying minimum in the interview.
Who this is for
B.E./B.Tech with 60 to 65 per cent (ONGC asks for 60 per cent, IOCL 65 per cent for general and OBC with relaxations for SC, ST and PwBD) in Mechanical, Electrical, Chemical, Civil, Instrumentation, Electronics, Computer Science or Metallurgy, or M.Sc. or M.Tech in Geology, Geophysics or Petroleum Technology for ONGC and Oil India, with a valid GATE score in the matching paper. Petroleum, geology and geophysics candidates are the field-science stream of ONGC.
The panel focuses on
- Discipline fundamentals applied to a refinery, pipeline, gas plant, rig or offshore platform
- Final-year project and internship, with your own contribution and one measurable result
- Why oil and gas and this company: upstream versus downstream, energy transition and the company's diversification
- Willingness for offshore or remote field postings, 14-day on-off rosters and transfers
- Service bond and training year, and the E1 grade and IDA pay structure
- Safety culture: permit to work, hydrocarbon hazards, HAZOP and lessons from industry incidents
Step 1
Pick your subject
The expert on the panel probes these areas at the level of this post. Optional here; you can choose during setup.
Step 2
Choose how you want to be interviewed
1:1 interview
One interviewer runs every round and adapts the focus as you go. Lower pressure; ideal for a first attempt.
Ms. Lakshmi Venkataraman
Technical lead
Panel interview · 3 members
Most realisticEach member leads their own round and hands over to the next. They hear each other, so a weak answer will be revisited.
Ms. Neha Kulkarni
HR member
Ms. Lakshmi Venkataraman
Technical lead
Mr. Vikram Malhotra
Hiring manager
What to expect
5 rounds · 16 minutes
The personal-interview part of a Maharatna or Navratna PSU selection, the way NTPC, ONGC, IOCL, BHEL, PGCIL, SAIL, Coal India, BEL and HAL run it: a short introduction with the HR member, a long technical round in the candidate's GATE discipline led by a senior engineer from the plant or field, an HR-and-fit round with a general manager on why a PSU, all-India posting, the service bond and career path, two plant or site situations on safety, breakdowns, contractors and unions, and a brief close. Real panels are four to six members for 20 to 30 minutes and mix English and Hindi freely; the technical round usually starts from the final-year project and goes to GATE-level fundamentals.
- Round 1
Introduction & background
· 2:00Put the candidate at ease, hear their education, GATE discipline, final-year project and any work experience, and pick one thread the technical member can pull on.
Ms. Neha Kulkarni2–3 questionsup to 1 follow-up each - Round 2
Technical round in the GATE discipline
· 6:00Test GATE-level fundamentals in the candidate's discipline and whether they can connect them to real plant or field equipment; probe the final-year project for what the candidate personally did.
Ms. Lakshmi Venkataraman3–5 questionsup to 2 follow-ups each - Round 3
Why a PSU, posting, bond & career
· 4:00Assess motivation for a public-sector career, willingness for remote all-India postings, understanding of the executive-trainee bond and probation, and whether the candidate has a realistic view of the career path and the company.
Mr. Vikram Malhotra3–4 questionsup to 1 follow-up each - Round 4
Plant & site situations
· 3:00Assess judgement on safety, breakdowns, contractors and union relations in a plant or site setting, with the right sequence of actions.
Mr. Vikram Malhotra2–2 questionsup to 1 follow-up each - Round 5
Closing
· 1:00Close politely, confirm documents and joining readiness, and give no hint of the assessment.
Ms. Neha Kulkarni1–1 questions
Sample questions
PSU GD/PI Oil & Gas PSUs interview questions
Questions panels commonly ask in the PSU GD/PI Oil & Gas PSUs interview, with what a strong answer covers. Practise them aloud with the AI panel.
- Refinery process
In a refinery crude distillation unit, why is crude oil heated in a furnace but not fully vaporised, and what decides where each product is drawn from the column?
What a strong answer covers
Explains partial vaporisation to avoid thermal cracking, the temperature gradient up the column, and side draws based on boiling ranges of products such as naphtha, kerosene and diesel, with residue going to vacuum distillation. Avoid describing the column as a simple boiling tank.
- Rotating equipment
A centrifugal pump on a product line is making a gravelly noise and its discharge pressure is fluctuating. What is likely happening, and how would you confirm it?
What a strong answer covers
Identifies probable cavitation, explains NPSH available versus required, and lists checks such as suction strainer blockage, suction pressure, fluid temperature and valve position. Avoid replacing the pump before diagnosing the suction side.
- Process safety
What is a HAZOP study, and how would you use guide words like no flow or more pressure on a simple gas pipeline section?
What a strong answer covers
Explains a structured team review of deviations from design intent using guide words, identifying causes, consequences and safeguards, with a quick worked example on the pipeline. Avoid presenting HAZOP as a checklist filled in alone.
- Pipelines
Explain cathodic protection on a buried cross-country gas pipeline, and why coating damage makes it harder.
What a strong answer covers
Describes how the pipe is made the cathode using sacrificial anodes or impressed current, and how coating defects expose steel, increasing current demand and local corrosion risk. Mentions periodic potential surveys. Avoid confusing cathodic protection with painting.
- Posting
Offshore roles often run on a fourteen days on, fourteen days off roster. Which part of that life will test you most?
What a strong answer covers
An honest, specific answer about isolation, fatigue or family events, with how the candidate would cope, and a realistic understanding of safety discipline on a platform. Avoid claiming nothing will be difficult.
- Energy transition
Oil companies are investing in biofuels, green hydrogen and city gas. Why should a young chemical engineer believe this sector still has a long career ahead?
What a strong answer covers
Balanced view: hydrocarbons remain significant for years, companies are diversifying, and engineering skills transfer to new energy projects. Mentions the company's own direction in general terms. Avoid inventing capacity targets or deadlines.
- Internship
Walk us through your internship at the refinery. Which unit were you in, and what did you notice that the operators knew but your textbook did not?
What a strong answer covers
Names the unit, describes a concrete observation such as how operators read trends or handle upsets, and shows respect for shop-floor experience. Avoid describing the unit only from its process flow diagram.
- Safety
During a shutdown, a senior technician tells you that gas testing before hot work is a waste of time on that vessel because it was purged yesterday. How do you respond?
What a strong answer covers
Insists on fresh gas testing as per the permit, explains politely that conditions change overnight, and involves the safety officer if needed while maintaining respect for the technician. Avoid either giving in or publicly humiliating the senior.
- Instrumentation
For an instrumentation role, why is a control valve on a fired heater fuel line usually chosen to fail closed, while a cooling water valve may fail open?
What a strong answer covers
Explains fail-safe philosophy: on loss of air or signal, the valve should move to the position that minimises hazard, cutting fuel to avoid overheating and keeping cooling flowing. Avoid answering without linking it to the process consequence.
Reading is not rehearsing. Answer these out loud to an AI PSU GD/PI Oil & Gas PSUs panel that follows up like the real one.
Practise these questionsMeet the panel
Your AI interviewers
Distinct personas, voices and questioning styles, briefed on this post.
Ms. Neha Kulkarni
ChairHR member
HR business partner, IT services
Friendly, efficient, detail-checking.
Female voice · 4 languages
Ms. Lakshmi Venkataraman
Technical lead
Chief Engineer (Production) at ONGC, Mumbai Offshore; 22 years across drilling, production and surface facilities; technical member on GT selection panels
Precise, curious, wants the physics behind the formula and the field behind the physics.
Female voice · 4 languages
Mr. Vikram Malhotra
Hiring manager
Engineering manager / Regional manager (hiring manager)
Direct, outcome-focused, fair but demanding.
Male voice · 2 languages
Languages
Answer in the language you think in
The panel asks in your chosen language. Switch mid-answer if you like.
- English
- Hinglish (Hindi + English)Hinglish
How scoring works
A report you can act on
Every round is scored on the rubric
Each interviewer scores only the criteria their round covers. Weights add up to your overall score out of 100.
Only what you actually said counts
Feedback quotes your own answers. Rounds you skip show as “Not assessed” rather than a zero.
Communication is always measured
Fluency, clarity, confidence and structure are tracked across the whole interview, in any language.
Pass mark, then a plan
You see the pass mark for this interview, your gaps, and the courses that close them fastest.
Scored on
- Technical depth35%
GATE-level command of the discipline: states the right principle, gets the direction and order of magnitude right, explains why a formula holds and where it breaks, and connects theory to real plant or field equipment; does not bluff when unsure.
- Problem solving & judgement20%
Reasons step by step through a numerical or a fault scenario, asks what data is needed, states assumptions, checks limits, and in plant situations sequences actions correctly with safety and isolation before diagnosis and repair.
- Communication20%
Clear and concise in English or Hindi; explains a technical idea so a non-specialist panel member follows it; answers the question asked; comfortable saying I do not know and reasoning from first principles.
- Fit & attitude25%
Credible reason for a public-sector career beyond job security, genuine willingness for remote plant, mine, rig or project postings and transfers, honest about the bond and about other attempts, respect for technicians, contractors and union members, and a realistic picture of an executive trainee's first years.
Pass mark 60 / 100 · PSU engineer-trainee personal interview (GATE-shortlisted)
Keep exploring
More PSU GD/PI interviews
- PSU GD/PI Power PSUs interviewExecutive Trainee (E1/E2 grade), fresh engineers and up to 3–5 years' experience, typically 27–30 years upper age with relaxations
- PSU GD/PI Heavy Engg & Mining interviewEngineer Trainee or Management Trainee (Technical) in E1 grade, fresh engineers, typically up to 27–30 years with relaxations
- PSU GD/PI Defence PSUs interviewProbationary Engineer, Design Trainee or Management Trainee in E1/E2 grade, fresh engineers, typically up to 25–28 years with relaxations