Air Liquide Engineer Trainee Interview Questions and Answers

Q1. Chemical name ,
Ans. Styrine, DVB 80% dayvinayl binzene, DCE daycloreethine, cloremethayl ether,Dempa dayethalymonopropralamine amine z , DMEA DAYMETHALY ENTHALPY AMINE, OLLEUM H²S²O⁷65%, sulphuric acid 98% , casutic Naoh 48% , TMA trymithaely amine, ACN acrorontrile, methonol, TBA trybeutlyamine ,
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Q2. Pumps, rector, safety
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Q3. Tank farm tanker loadingandunloading
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Q4. Cllasfaction,distilision,aminez distlition
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Q5. HCl distilition
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Job lanxess apperetence and freezer

It was 1 hour 45 min test where 40 question from technical side and 50 questions from aptitude. My engineering was chemical engineering so in technical part there were questions from different semester subjects like fluid operation, mass transfer, thermodynamics etc.
In case of aptitude it was logical reasoning, verbal reasoning, algebra. The aptitude was quite moderate level and technical was easy in my opinion.

Q1. Tell me about yourself
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Q2. So you did internship from Aditya birla group? In which plant you did your training. (They asked me more questions from internship only)
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Q3. What do you know by distillation?
Ans. 
Distillation is a process of separating components of a mixture based on their boiling points.
• It involves heating the mixture to vaporize the component with the lowest boiling point.

• The vapor is then condensed and collected as a separate liquid.

• This process is commonly used in the production of alcoholic beverages, fuels, and essential oils.

• Fractional distillation is a variation of distillation that is used to separate...read more
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Q4. What is the significance of relative volatility?
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Relative volatility is a measure of the difference in vapor pressures of two components in a mixture.
• It is used in distillation processes to determine the separation efficiency of a mixture.

• Higher relative volatility indicates easier separation of components.

• It is calculated as the ratio of vapor pressures of the two components.

• For example, in the separation of ethanol and water, ethanol has a higher relative volatilit
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Q5. What happens when relative volatility is equal to 1. Does distillation is possible during this situation.
Ans. 
Equal relative volatility means no separation is possible in distillation.
• Relative volatility is the ratio of vapor pressures of two components in a mixture.

• When it is equal to 1, the vapor pressures of both components are equal.

• This means they will boil and condense at the same temperature, making separation impossible.

• Distillation relies on the difference in boiling points of components to separate them.

• Therefore, di...read more
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Q6. Explain extractive distillation
Ans. 
Extractive distillation is a process used to separate two or more components from a mixture using a solvent.
• It involves adding a solvent to the mixture to form two liquid phases.

• The solvent selectively removes one component from the mixture, leaving the other behind.

• The solvent and the removed component are then separated from each other by distillation.

• Examples include separating ethanol from water using benzene as a ...read more
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Q7. Define types of NPSH. State the difference between the type
Ans. 
Types of NPSH and their differences
• Net Positive Suction Head (NPSH) is the difference between the absolute pressure at the pump suction and the vapor pressure of the liquid being pumped.

• Types of NPSH are available NPSH (NPSHa) and required NPSH (NPSHr).

• NPSHa is the amount of NPSH available at the pump suction, while NPSHr is the amount of NPSH required by the pump.

• The difference between NPSHa and NPSHr determines wheth...read more
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Q8. How to increase NPSHr when your NPSHa is more than NPSHr
Ans. 
To increase NPSHr when NPSHa is more, reduce the impeller diameter or increase the speed of the pump.
• Reduce impeller diameter

• Increase pump speed
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Q1. What is muffel furnace
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1 hour test consisting of a general aptitude test

After completing the aptitude test I was immediately referred to the coding test codding test has 3 easy questions and sufficient time to complete them!

Q1. It was regarding pointers
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Q2. Count the frequency of elements in an array
Ans. 
Count frequency of elements in an array of strings
• Create a dictionary to store element frequency

• Loop through array and update dictionary

• Return dictionary
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Q1. Introduction and question from my hobby I said global affairs so he asked about recent global affairs
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Q2. My background what family background I belong
Ans. 
I come from a diverse family background with a mix of cultures and traditions.
• My parents are from different countries, so I have been exposed to different languages and customs.

• Growing up, I celebrated holidays and festivals from both sides of my family.

• This diverse background has taught me to appreciate different perspectives and adapt to new environments.
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Q3. Are you willing to relocate?
Ans. 
Yes, I am willing to relocate for the Graduate Engineer Trainee position.
• I am open to moving to a new location for career growth and opportunities.

• I understand that relocation may be necessary to work on specific projects or assignments.

• I am flexible and adaptable to new environments and cultures.

• I am excited about the prospect of exploring new cities and experiencing different work settings.

• I am committed to my profes...read more
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Q4. This lasted for about 12 minutes
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