Schlumberger DevOps Lead Interview Questions and Answers

My GD topic was renewable energy.

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++
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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
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Q3. What do your parents do
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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
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Q4. Have you ever visited Delhi earlier
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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
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Q5. How did you reach Noida for interview
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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
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Q7. Related family background
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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.
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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
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Q3. Detailed refrigeration cycles
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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...read more
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Q4. Safety related questions which I couldn't answer well
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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
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Q6. Furnace tubes Welding related questions
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Q7. Scaffolding and insulation related general questions (easy)
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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...read more
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Q2. How would you prepare a hydrocarbon vessel for vessel entry?
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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...read more
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Q1. Explain the well integrity and well barrier elements.
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Well integrity and well barrier elements are crucial components in ensuring the safety and efficiency of oil and gas wells.
• Well integrity refers to the ability of a well to contain fluids within the intended zones and prevent any leaks or failures.

• Well barrier elements are physical or mechanical barriers that are put in place to prevent the escape of fluids from the wellbore.

• Examples of well barrier elements include ca...read more
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Q2. Explain the processes involved in Upstream.
Ans. 
Upstream processes involve exploration, drilling, and production of oil and gas.
• Exploration: Involves searching for potential oil and gas reserves using seismic surveys and other techniques.

• Drilling: Once a potential reserve is identified, wells are drilled to extract the oil and gas.

• Production: Oil and gas are extracted from the wells and processed for distribution.

• Examples: Offshore drilling in the Gulf of Mexico, sh
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Q3. Did you have any conflict with your supervisor of any others?
Ans. 
No conflicts with supervisor or others.
• I have not had any conflicts with my supervisor or colleagues.

• I believe in open communication and resolving issues professionally.

• I prioritize teamwork and collaboration to prevent conflicts from arising.
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Q1. Transformer testing
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Q2. Transformer protection
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Q3. SAP Maintenance module
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Q4. Spare maintenance philosophy
Ans. 
Spare maintenance philosophy focuses on maintaining spare parts to minimize downtime and ensure efficient operations.
• Spare maintenance philosophy aims to have a sufficient inventory of spare parts to quickly replace any faulty components.

• It involves regular inspections and maintenance of spare parts to ensure their functionality and readiness.

• The philosophy emphasizes proactive planning and forecasting to anticipate th...read more
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Q5. Planning strategy
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Q1. What is poroosity
Ans. 
Porosity is the measure of empty spaces in a material, often used in geology and engineering.
• Porosity is the ratio of void spaces to total volume in a material.

• It is expressed as a percentage.

• Porosity is important in fields like geology for assessing rock formations and in engineering for determining the strength of materials.

• Examples of porous materials include sponges, pumice stones, and aerogels.
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Q2. What is permeability
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Permeability is the property of a material that allows fluids or gases to pass through it.
• Permeability is a measure of how easily a substance can pass through a material.

• It is often used in geology to describe how easily fluids can flow through rocks or soil.

• Permeability can be affected by factors such as pore size, connectivity, and fluid viscosity.

• Materials like sandstone have high permeability, while materials like
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Q3. Why you want this job
Ans. 
I am passionate about helping others and believe this job will allow me to make a positive impact in the community.
• I have a strong desire to contribute to the well-being of others

• I am excited about the opportunity to work in a team-oriented environment

• I am eager to learn and grow in my career
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Q4. Oil shale vs shale oil differnece
Ans. 
Oil shale is a rock containing kerogen that can be converted into shale oil through a process called retorting.
• Oil shale is a sedimentary rock containing kerogen, a precursor to oil.

• Shale oil is the liquid hydrocarbons extracted from oil shale through a process called retorting.

• Oil shale deposits are found in various countries like the United States, Estonia, and China.

• Shale oil production has increased in recent years
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Q5. Unconventional reservoir
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Q1. Different connecting modes in Power Bi
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Power BI offers various connecting modes to retrieve and analyze data from different sources effectively.
• DirectQuery: Connects directly to the data source, allowing real-time data access. Example: SQL Server.

• Import Mode: Imports data into Power BI, enabling faster performance but requiring data refresh. Example: Excel files.

• Live Connection: Similar to DirectQuery but specifically for Analysis Services, providing real-t...read more
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Q1. I was asked to make a presentation on laser technology.
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Knowledge of the English language, its vocabulary and comprehension. Ability to solve basic mathematical problem, which shows the capacity to use an analytical approach to everyday puzzles.