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Oil And Natural Gas Corporation Engineer Interview Questions and Answers

Updated 10 Sep 2024

Oil And Natural Gas Corporation Engineer Interview Experiences

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Engineer Interview Questions & Answers

user image Anonymous

posted on 10 Sep 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Sep 2023. There were 2 interview rounds.

Round 1 - Aptitude Test 

2 hrs quantitative and Current affairs

Round 2 - One-on-one 

(2 Questions)

  • Q1. What were doing after completion of your B Tech
  • Ans. 

    After completing my B Tech, I pursued a Master's degree in Engineering to further enhance my skills and knowledge.

    • Enrolled in a Master's program in Engineering

    • Focused on specialized courses related to my field of interest

    • Participated in research projects and internships to gain practical experience

  • Answered by AI
  • Q2. What is generative AI
  • Ans. 

    Generative AI is a type of artificial intelligence that is capable of creating new content, such as images, text, or music, based on patterns and examples it has been trained on.

    • Generative AI uses neural networks to generate new content based on patterns in existing data.

    • Examples of generative AI include DeepDream, which creates surreal images, and GPT-3, a language model that can generate human-like text.

    • Generative AI...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Be confident and you are bound to get it

Skills evaluated in this interview

Interview questions from similar companies

Interview Preparation Tips

Round: Ist
Experience: It was an interview in year 1984 at Ranjit Hotel in Delhi and I came from varanasi to Delhi. Initially they letter us wait outside and afterwards tea was served to us.It was one of the costliest served tea of that time.They asked simple questions.But number of candidates selected in written test was 3 times more than final candidates to be selected. I could not get through.


I applied via Campus Placement

Interview Preparation Tips

Skill Tips: Thermodynamics
Mass transfer
Heat transfer
CRE
Skills: Core Courses Concepts
Duration: 2
College Name: IIT Madras
Motivation: No motivation whatsoever.

I applied via Campus Placement and was interviewed before Dec 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Based on your project

Interview Preparation Tips

Interview preparation tips for other job seekers - stick to basics, answer straight forward, try to provide some examples while answering.

I applied via Naukri.com and was interviewed before Jun 2020. There was 1 interview round.

Interview Questionnaire 

28 Questions

  • Q1. What is mean by safety
  • Ans. 

    Safety refers to the condition of being protected from harm, danger, or injury.

    • Safety involves taking measures to prevent accidents and injuries

    • It includes following rules and regulations to ensure a safe environment

    • Safety can be achieved through proper training and education

    • Examples of safety measures include wearing protective gear, using safety equipment, and practicing safe behaviors

    • Safety is important in all indus...

  • Answered by AI
  • Q2. What is LEL
  • Ans. 

    LEL stands for Lower Explosive Limit and is the minimum concentration of a gas or vapor in air that can ignite.

    • LEL is a safety term used in industries dealing with flammable gases and liquids.

    • It is expressed as a percentage of the gas or vapor in air.

    • If the concentration of the gas or vapor is below the LEL, it is too lean to ignite.

    • If the concentration is above the LEL, it is too rich and can ignite.

    • For example, the L...

  • Answered by AI
  • Q3. What is RA
  • Q4. What is JSA/JHA
  • Ans. 

    JSA/JHA stands for Job Safety Analysis/Job Hazard Analysis. It is a process of identifying potential hazards and risks in a job or task.

    • JSA/JHA is a systematic approach to identify and mitigate potential hazards in a job or task

    • It involves breaking down a job or task into steps and analyzing each step for potential hazards

    • The analysis includes identifying the hazards, assessing the risks, and implementing controls to m...

  • Answered by AI
  • Q5. Role of HSE
  • Ans. 

    HSE plays a crucial role in ensuring the safety and well-being of employees and the environment.

    • HSE stands for Health, Safety, and Environment.

    • It involves identifying and assessing potential hazards and implementing measures to control or eliminate them.

    • HSE also includes training employees on safety procedures and emergency response plans.

    • Examples of HSE measures include wearing personal protective equipment, conductin...

  • Answered by AI
  • Q6. What is Hchem
  • Ans. 

    Hchem is not a known term or acronym in the engineering field.

    • Hchem is not a commonly used term in engineering

    • It is possible that the interviewer misspoke or meant to ask a different question

    • Without more context, it is difficult to provide a more specific answer

  • Answered by AI
  • Q7. What is Hazop
  • Ans. 

    Hazop is a structured and systematic technique used to identify potential hazards and operability problems in industrial processes.

    • Hazop stands for Hazard and Operability Study

    • It involves a team of experts analyzing a process to identify potential hazards and operability issues

    • Hazop is commonly used in the chemical, oil and gas, and pharmaceutical industries

    • The process involves breaking down the process into smaller pa...

  • Answered by AI
  • Q8. What is confined space
  • Ans. 

    Confined space refers to an area that is enclosed and has limited access and ventilation.

    • Examples include tanks, silos, sewers, and tunnels.

    • Workers entering confined spaces must follow safety protocols and use specialized equipment.

    • Hazards in confined spaces include lack of oxygen, toxic gases, and physical obstructions.

    • Proper training and communication are crucial for working in confined spaces.

  • Answered by AI
  • Q9. What is work at height
  • Ans. 

    Work at height refers to any task performed at a height where a person could fall and injure themselves.

    • Work at height involves working on ladders, scaffolding, roofs, or any other elevated surface

    • It is important to use appropriate safety equipment such as harnesses, guardrails, and safety nets

    • Workers should be trained on how to safely work at height and how to properly use safety equipment

    • Examples of work at height in...

  • Answered by AI
  • Q10. Hazard of confined space
  • Ans. 

    Confined spaces pose a significant hazard due to limited entry and exit points, poor ventilation, and potential for hazardous substances.

    • Limited entry and exit points can make it difficult to escape in case of an emergency

    • Poor ventilation can lead to a buildup of toxic gases or lack of oxygen

    • Potential for hazardous substances such as chemicals, fumes, or dust

    • Examples include tanks, silos, sewers, and tunnels

    • Proper trai...

  • Answered by AI
  • Q11. Precautions of confined space
  • Ans. 

    Precautions to be taken while working in confined spaces

    • Proper ventilation and air quality testing

    • Use of personal protective equipment

    • Proper lighting and communication equipment

    • Training and certification for workers

    • Emergency rescue plan in place

  • Answered by AI
  • Q12. What is LEL&UEL
  • Ans. 

    LEL&UEL stands for Lower Explosive Limit and Upper Explosive Limit respectively. They are the minimum and maximum concentrations of a flammable gas or vapor in air that can ignite.

    • LEL is the lowest concentration of a gas or vapor that can ignite

    • UEL is the highest concentration of a gas or vapor that can ignite

    • Concentrations between LEL and UEL are considered flammable

    • LEL and UEL vary depending on the gas or vapor

    • LEL an...

  • Answered by AI
  • Q13. What is competent person
  • Q14. What is fire
  • Ans. 

    Fire is a chemical reaction that releases heat, light, and various gases.

    • Fire is a rapid oxidation process that occurs when fuel (such as wood, paper, or gasoline) combines with oxygen in the presence of heat or a spark.

    • It releases heat, light, and various gases such as carbon dioxide, water vapor, and nitrogen oxides.

    • Fire can be beneficial (such as for cooking or heating) or destructive (such as in wildfires or house ...

  • Answered by AI
  • Q15. Types of fire
  • Ans. 

    There are four types of fire: Class A, Class B, Class C, and Class D.

    • Class A fires involve ordinary combustibles such as wood, paper, or cloth.

    • Class B fires involve flammable liquids or gases such as gasoline, oil, or propane.

    • Class C fires involve electrical equipment such as appliances, wiring, or circuit breakers.

    • Class D fires involve combustible metals such as magnesium, titanium, or sodium.

  • Answered by AI
  • Q16. Type of extinguisher
  • Ans. 

    There are different types of fire extinguishers for different types of fires.

    • Water extinguishers for Class A fires (wood, paper, cloth, etc.)

    • CO2 extinguishers for Class B and C fires (flammable liquids and electrical fires)

    • Dry chemical extinguishers for Class A, B, and C fires

    • Foam extinguishers for Class A and B fires

    • Wet chemical extinguishers for Class K fires (cooking oils and fats)

  • Answered by AI
  • Q17. Modes of heat transfer
  • Ans. 

    Modes of heat transfer include conduction, convection, and radiation.

    • Conduction is the transfer of heat through a material without any movement of the material itself.

    • Convection is the transfer of heat through the movement of fluids, such as air or water.

    • Radiation is the transfer of heat through electromagnetic waves, such as from the sun or a fire.

  • Answered by AI
  • Q18. How to prevent fire
  • Ans. 

    Preventing fire requires proper handling of flammable materials and regular maintenance of electrical equipment.

    • Store flammable materials in designated areas away from heat sources

    • Regularly inspect and maintain electrical equipment

    • Install smoke detectors and fire extinguishers in appropriate locations

    • Train employees on fire safety procedures and evacuation plans

  • Answered by AI
  • Q19. What is msds
  • Ans. 

    MSDS stands for Material Safety Data Sheet.

    • MSDS provides information about hazardous chemicals and substances.

    • It includes information about the physical and chemical properties of the substance, health hazards, precautions for safe handling and use, and emergency procedures.

    • MSDS is required by law for all hazardous chemicals and substances used in the workplace.

    • It is important to read and understand the MSDS before usi...

  • Answered by AI
  • Q20. How to do firefighting
  • Ans. 

    Firefighting involves identifying and extinguishing fires to prevent damage and loss of life.

    • Assess the situation and determine the type and size of fire

    • Use appropriate firefighting equipment such as fire extinguishers, hoses, and pumps

    • Follow safety protocols and wear protective gear

    • Coordinate with other firefighters and emergency responders

    • Evacuate people from the affected area

    • Monitor the situation and ensure the fire

  • Answered by AI
  • Q21. How to prevent the accident
  • Ans. 

    Prevent accidents by identifying potential hazards and implementing safety measures.

    • Conduct regular safety audits and risk assessments

    • Provide proper training and education to employees

    • Implement safety protocols and procedures

    • Use appropriate safety equipment and gear

    • Encourage a culture of safety and accountability

    • Regularly review and update safety policies and procedures

  • Answered by AI
  • Q22. How to investigate the accident
  • Ans. 

    To investigate an accident, follow a systematic approach involving data collection, analysis, and identification of root causes.

    • Gather all available information about the accident, including eyewitness accounts, photographs, and any relevant documents or records.

    • Conduct interviews with individuals involved in the accident to gather their perspectives and insights.

    • Examine the accident scene for physical evidence, such a...

  • Answered by AI
  • Q23. Emergency procedure
  • Q24. What is H2s
  • Ans. 

    H2S is a colorless, flammable, and toxic gas with a strong odor of rotten eggs.

    • H2S is commonly known as hydrogen sulfide.

    • It is produced naturally by the breakdown of organic matter and is found in natural gas, crude oil, and volcanic gases.

    • It is highly toxic and can cause respiratory failure, loss of consciousness, and even death.

    • H2S is used in various industries such as oil and gas, mining, and pulp and paper.

    • It is al...

  • Answered by AI
  • Q25. Properties of H2s
  • Ans. 

    H2S is a colorless, flammable, and toxic gas with a strong odor of rotten eggs.

    • H2S is highly flammable and can ignite easily

    • It is toxic and can cause respiratory failure

    • It has a distinctive odor of rotten eggs

    • H2S is used in the production of sulfuric acid and in the petroleum industry

  • Answered by AI
  • Q26. Hirerchy procedure
  • Q27. Permissible exposure limit of H2s,co,co2,methane
  • Ans. 

    Permissible exposure limits (PEL) are the maximum allowable concentrations of hazardous substances in the workplace.

    • H2S: PEL is 10 ppm (parts per million) over an 8-hour workday

    • CO: PEL is 50 ppm over an 8-hour workday

    • CO2: No specific PEL, but recommended exposure limit is 5,000 ppm over an 8-hour workday

    • Methane: No specific PEL, but recommended exposure limit is 1,000 ppm over an 8-hour workday

  • Answered by AI
  • Q28. Short term exposure limit of H2s
  • Ans. 

    Short term exposure limit (STEL) of H2S is 10 ppm.

    • STEL is the maximum concentration of a substance that a worker can be exposed to for a short period of time without suffering from immediate or long-term health effects.

    • The STEL for H2S is set at 10 ppm (parts per million) by OSHA (Occupational Safety and Health Administration).

    • Exposure to H2S at levels above the STEL can cause symptoms such as eye irritation, headache,...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep calm when you are giving the interview and first prepare the interview

I applied via Campus Placement and was interviewed before May 2020. There was 1 interview round.

Interview Questionnaire 

2 Questions

  • Q1. About college project
  • Q2. Why you want this job

Interview Preparation Tips

Interview preparation tips for other job seekers - Be truthful about what you have done in project.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed in Jan 2024. There were 3 interview rounds.

Round 1 - Group Discussion 

My GD topic was renewable energy.

Round 2 - HR 

(7 Questions)

  • Q1. Tell me about yourself
  • Ans. 

    I am a Senior Engineer with 10+ years of experience in designing and implementing complex systems.

    • 10+ years of experience in engineering

    • Specialize in designing and implementing complex systems

    • Strong problem-solving skills

    • Experience with various programming languages such as Java, Python, and C++

  • Answered by AI
  • Q2. Why do you want to leave your previous company and join GAIL
  • Ans. 

    Seeking new challenges and growth opportunities at GAIL.

    • Desire for new challenges and opportunities for growth

    • Interested in working in a different industry or with different technologies

    • Attracted to GAIL's reputation and projects

    • Seeking a more collaborative and innovative work environment

  • Answered by AI
  • Q3. What do your parents do
  • Ans. 

    My parents are both retired now, but my father used to work as a civil engineer and my mother was a teacher.

    • Father worked as a civil engineer

    • Mother was a teacher

    • Both are retired now

  • Answered by AI
  • Q4. Have you ever visited Delhi earlier
  • Ans. 

    Yes, I have visited Delhi earlier for a business trip.

    • Visited Delhi for a business trip

    • Explored historical sites like Red Fort and Qutub Minar

    • Enjoyed local cuisine like butter chicken and chaat

  • Answered by AI
  • Q5. How did you reach Noida for interview
  • Q6. Where are you staying in Noida for interview process
  • Ans. 

    I am staying at a hotel in Sector 18, Noida for the interview process.

    • Staying at a hotel in Sector 18, Noida

    • Close to the interview location

    • Comfortable accommodation for the duration of the process

  • Answered by AI
  • Q7. Related family background
Round 3 - Technical 

(7 Questions)

  • Q1. Detailed technical questions about bearing, pump, furnace tubes (1st and 2nd pass)MOC, TLE MOC, heat exchanger tube MOC, TEMA codes and classification etc.
  • Q2. Decoking process of cracking furnace, Naphtha circuit of furnace with sketches,
  • Ans. 

    Decoking process involves removing coke deposits from cracking furnace and naphtha circuit to maintain efficiency.

    • Decoking process involves burning off coke deposits using controlled combustion.

    • Mechanical decoking involves using high-pressure water jets to remove coke deposits.

    • Chemical decoking involves using solvents or acids to dissolve coke deposits.

    • Regular decoking is essential to prevent blockages and maintain fur

  • Answered by AI
  • Q3. Detailed refrigeration cycles
  • Ans. 

    Refrigeration cycles are thermodynamic processes used in refrigerators and air conditioners to transfer heat from a low temperature reservoir to a high temperature reservoir.

    • Refrigeration cycles typically involve four main components: compressor, condenser, expansion valve, and evaporator.

    • The refrigerant undergoes a cycle of compression, condensation, expansion, and evaporation to absorb heat from the space being coole...

  • Answered by AI
  • Q4. Safety related questions which I couldn't answer well
  • Q5. Safety procedures before starting of hot job
  • Ans. 

    Safety procedures before starting a hot job include obtaining a hot work permit, conducting a hazard assessment, ensuring proper ventilation, and having fire extinguishing equipment nearby.

    • Obtain a hot work permit before starting any hot job

    • Conduct a hazard assessment to identify potential risks

    • Ensure proper ventilation in the work area to prevent buildup of flammable gases

    • Have fire extinguishing equipment nearby and r

  • Answered by AI
  • Q6. Furnace tubes Welding related questions
  • Q7. Scaffolding and insulation related general questions (easy)

Interview Preparation Tips

Interview preparation tips for other job seekers - Be prepared for GD and just keep enough technical knowledge on your field of experience. Be relaxed and give interview with happy face..don't be depressed if you couldn't answer any question during interview. If you don't know anything just say "I don't know" ...keep the things simple and give honest answer always.

I applied via Company Website and was interviewed before Sep 2021. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. How will you identify if a pump is cavitating while working on a DCS panel?
  • Ans. 

    To identify if a pump is cavitating while working on a DCS panel, you can look for certain indicators.

    • Monitor the pump's suction pressure. If it is fluctuating or dropping below the specified range, it may indicate cavitation.

    • Check the pump's discharge pressure. If it is higher than normal, it could be a sign of cavitation.

    • Listen for unusual noises such as a rattling or grinding sound coming from the pump.

    • Inspect the p...

  • Answered by AI
  • Q2. How would you prepare a hydrocarbon vessel for vessel entry?
  • Ans. 

    To prepare a hydrocarbon vessel for vessel entry, follow these steps:

    • Ensure the vessel is properly isolated from the process and all sources of energy

    • Ventilate the vessel to remove any flammable or toxic gases

    • Perform a thorough inspection of the vessel for any signs of leaks or damage

    • Implement proper lockout/tagout procedures to prevent accidental activation of equipment

    • Provide appropriate personal protective equipment...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for GAIL Senior Engineer interview:
  • Chemical Engineering
  • DCS Operations
Interview preparation tips for other job seekers - Try to answer the questions asked in simple words. The interviewer generally wants to judge an interviewee based on his understanding of the subject. When an applicant is appearing for an interview, he should share his experience and try to quote examples from his experience.
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test 

Hi there good luck to you

Round 2 - Technical 

(1 Question)

  • Q1. What is Material management for you
  • Ans. 

    Material management involves planning, organizing, and controlling the flow of materials from acquisition to use or disposal.

    • Involves planning, organizing, and controlling materials

    • Ensures materials are available when needed

    • Optimizes inventory levels to minimize costs

    • Tracks and monitors material usage and waste

    • Coordinates with suppliers for timely delivery

  • Answered by AI

I applied via Recruitment Consulltant and was interviewed in Mar 2022. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. 1. MDPE pipe laying process, testing and commissioning process 2. T4S document 3. PE pipe manufacturing process 4. LMC activity 5. Electrofusion process 6. Conversion activity 7. Standards in CGD

Interview Preparation Tips

Topics to prepare for Adani Gas Senior Engineer interview:
  • CGD
Interview preparation tips for other job seekers - This is good company to start career in CGD industry. You should know how to handle Office politics.

Oil And Natural Gas Corporation Interview FAQs

How many rounds are there in Oil And Natural Gas Corporation Engineer interview?
Oil And Natural Gas Corporation interview process usually has 2 rounds. The most common rounds in the Oil And Natural Gas Corporation interview process are Aptitude Test and One-on-one Round.

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Oil And Natural Gas Corporation Engineer Interview Process

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₹4.9 L/yr - ₹11.3 L/yr
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