L&T Energy Hydrocarbon Pget Interview Questions and Answers

Aptitude test was not prompt

Q1. They mentioned personal interview for technical round
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Q2. They took technical interview and then gave detailing work.
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Q1. Hr is very poor
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Q1. What is load density?
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Q2. What will be short circuit current form 1000kVA TF (5% Z) on a panel and determine it’s CB Fault current rating? Which IEC Standard is used?
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Q3. What will be cable size & CB rating for 50KW motor at 30m distance from panel?
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Q4. What is CRI? (Lighting design)
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Q5. What is UGR? (Lighting design)
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Q6. What is Uniformity factor? (Lighting design)
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Q7. What is maintenance factor? (Lighting design)
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Q8. What are reflection index in rooms?
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Q9. How to design exit sign lighting in corridor or pathways? (Lighting design)
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Q10. How to design earthing?
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Q11. What earth loop impedance?
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Q12. How to design transformer room?
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Q13. How to size cable tray?
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Q14. How much spacing required between smoke detectors?
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Q15. How clearance maintained with cable tray and wet service pipe ?
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Q16. How to design CCTV system ? which cable used for CCTV?
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Q17. What is Harmonics in transformer? What are it’s impacts on system and how to reduce it?
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Q1. Revit tool test: -Link Arch file. -Copy monitor all levels. -Create central file. -Create filter for power, lighting & cable tray. -Create workset for power, lighting. -Create view template. -Place panels ...read more
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Q2. Post tool test questions. 1. What is Type & instance parameter? 2. What is view template & revit template? 3. Template file format? 4. How to do electrical distribution. 5. What is difference between navi...read more
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Q1. Control Valve datasheet details.
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Q2. PSV scenarios calculations
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Q1. Heat exchanger pipping
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Q2. Rack piping
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Q1. What is difference between static and dynamic analysis
Ans. 
Static analysis deals with loads that do not change over time, while dynamic analysis considers loads that vary with time.
• Static analysis is used to determine the effects of loads that do not change over time, such as dead loads and live loads.

• Dynamic analysis considers loads that vary with time, such as wind loads, seismic loads, and vibrations.

• Static analysis is simpler and less computationally intensive compared to ...read more
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Q2. How to perform spectral fatigue analysis
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Spectral fatigue analysis is performed by calculating the stress response of a structure to dynamic loads over a range of frequencies.
• Determine the dynamic loads acting on the structure

• Calculate the stress response of the structure using spectral methods

• Analyze the stress response at different frequencies to assess fatigue damage

• Consider factors such as material properties, load history, and environmental conditions

• Use...read more
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Q1. How do you tackle in case of conflict of interest
Ans. 
I prioritize transparency, disclose the conflict, and recuse myself if necessary.
• Prioritize transparency and disclose the conflict to all parties involved

• Evaluate the situation and determine if recusal is necessary

• Seek guidance from a supervisor or ethics committee if unsure how to proceed
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Q2. What is your notice period
Ans. 
My notice period is currently one month.
• Notice period is one month

• I am required to give one month notice before leaving my current position

• I can start a new position after one month
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Q1. Do you have experience with basements and below ground structures
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Yes, I have extensive experience with basements and below ground structures.
• I have designed and analyzed numerous basements for residential and commercial buildings.

• I am familiar with waterproofing techniques and soil mechanics related to below ground structures.

• I have experience with retaining walls, foundations, and underground parking structures.

• I have worked on projects involving deep excavations and shoring system...read more
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Q1. What you do in your last company
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Q1. How to calculate pipe wall thickness
Ans. 
Pipe wall thickness can be calculated using various methods based on the material, pressure, and temperature of the pipe.
• Calculate using Barlow's formula: t = PD/(2S - 0.8P)

• Consider factors like material properties, pressure, temperature, and safety factor

• Consult relevant codes and standards for specific calculations

• Use software tools like CAESAR II for complex piping systems
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