Evonik Process Associate Interview Questions and Answers

Aptitude test with analytical skills required

Q1. What is distillation
Ans. 
Distillation is a process of separating components of a liquid mixture based on differences in boiling points.
• Distillation involves heating the liquid mixture to create vapor, then cooling the vapor to collect the separated components.

• The component with the lower boiling point will vaporize first and be collected, leaving behind the component with the higher boiling point.

• Examples of distillation include the separation...read more
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Q2. Where we use vacuum distillation
Ans. 
Vacuum distillation is used in industries such as petrochemical, pharmaceutical, and food processing to separate components with high boiling points.
• Used in petrochemical industry to separate high boiling point components like lubricating oils and waxes

• Utilized in pharmaceutical industry to purify chemicals and separate compounds with similar boiling points

• Commonly used in food processing to extract flavors and fragran...read more
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Q3. What is adsorption
Ans. 
Adsorption is the process in which molecules or particles adhere to the surface of a solid or liquid material.
• Adsorption involves the accumulation of molecules or particles on the surface of a material.

• It is a surface phenomenon, different from absorption where a substance is taken into the bulk of another material.

• Examples include the adsorption of pollutants onto activated carbon in water treatment processes.
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Q4. What are different types of separation methods
Ans. 
Different types of separation methods include filtration, distillation, chromatography, and centrifugation.
• Filtration: Separates solids from liquids or gases using a porous material.

• Distillation: Separates components based on differences in boiling points.

• Chromatography: Separates components based on their affinity for a stationary phase.

• Centrifugation: Separates components based on differences in density and size.
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Q5. What projects have you done in M.Tech
Ans. 
I have worked on projects related to machine learning, data analysis, and optimization algorithms during my M.Tech.
• Developed a machine learning model to predict customer churn in a telecom company

• Implemented data analysis techniques to identify patterns in stock market data

• Optimized scheduling algorithms for a manufacturing plant to minimize downtime
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Q1. Line sizing, pump hydraulics
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Q2. Heat exchanger design
Ans. 
Heat exchanger design involves selecting appropriate materials, determining heat transfer coefficients, and optimizing flow rates.
• Consider the type of fluid being used and its properties

• Choose materials that can withstand the temperature and pressure of the fluids

• Calculate the heat transfer coefficients for each fluid

• Optimize the flow rates to maximize heat transfer efficiency

• Consider the overall size and cost of the h
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Q1. Basic of chemical engineering
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Q2. State third Law of thermodynamics
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The third Law of thermodynamics states that the entropy of a perfect crystal at absolute zero is zero.
• The third Law of thermodynamics states that as the temperature of a system approaches absolute zero, the entropy of the system also approaches zero.

• It is impossible to reach absolute zero in practice, but this law helps in understanding the behavior of systems at extremely low temperatures.

• This law is important in the ...read more
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Q3. Types of distillation
Ans. 
Distillation is a separation process that involves heating a liquid mixture to create vapor and then cooling the vapor to get a purified liquid.
• Types of distillation include simple distillation, fractional distillation, and steam distillation.

• Simple distillation is used for separating components with large boiling point differences.

• Fractional distillation is used for separating components with closer boiling points.

• Ste...read more
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Q4. Academic project
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Q1. Pump hydraulics and circuit
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30 min

Q1. Process knowledge, it was about educational background. how it is related to company
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Q1. Job profile about past organization
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Q1. Basic technical question
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