Aragen Life Sciences Process Engineer Interview Questions and Answers

Q1. What is tip speed, and how do you calculate it from the laboratory to the pilot plant?
Ans. 
Tip speed is the speed at the outer edge of a rotating object, calculated by multiplying the radius by the angular velocity.
• Tip speed is the speed at the outer edge of a rotating object.

• It is calculated by multiplying the radius of the object by the angular velocity.

• In the laboratory, tip speed can be calculated using the formula: Tip Speed = 2 * π * Radius * RPM.

• In the pilot plant, the same formula can be used to calc...read more
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Q2. What are heat transfer and mass transfer, and what is their significance?
Ans. 
Heat transfer is the movement of heat from one place to another, while mass transfer is the movement of mass from one place to another. Both are important in various engineering processes.
• Heat transfer involves conduction, convection, and radiation.

• Mass transfer involves diffusion, convection, and molecular diffusion.

• Significance of heat transfer includes maintaining temperature in chemical reactors, HVAC systems, etc.

• ...read more
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Q3. What actions have you taken in troubleshooting?
Ans. 
I have taken various actions in troubleshooting, including analyzing data, conducting experiments, and collaborating with team members.
• Analyze data to identify potential issues

• Conduct experiments to test hypotheses

• Collaborate with team members to brainstorm solutions

• Utilize problem-solving skills to troubleshoot complex problems
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Q4. What are Power Number and Flow Number?
Ans. 
Power Number and Flow Number are dimensionless numbers used in fluid mechanics to characterize the flow behavior of fluids in different systems.
• Power Number is a dimensionless number used to characterize the power consumption in a mixing system. It is defined as the ratio of the power input to the fluid to the product of the impeller speed, impeller diameter, and fluid density.

• Flow Number is a dimensionless number used...read more
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Q5. How do the P/V ratio and tip speed affect the selection of scale-up, and what criteria do you use for this selection?
Ans. 
P/V ratio and tip speed impact scale-up selection in process engineering.
• P/V ratio affects the level of shear stress in the system, influencing mixing and reaction rates.

• Higher tip speeds can lead to increased shear forces and heat generation, impacting product quality.

• Selection criteria include desired mixing intensity, heat transfer requirements, and shear sensitivity of the product.

• For example, in pharmaceutical man...read more
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Q6. What is HAZAOP, and what is the procedure for it?
Ans. 
HAZOP stands for Hazard and Operability Study, a systematic method to identify potential hazards and operability issues in a process.
• HAZOP is a structured and systematic examination of a process to identify potential hazards and operability issues.

• It involves a team of experts analyzing the process step by step to identify deviations from the design intent.

• The team uses guide words such as 'no', 'more', 'less', 'as wel...read more
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Q7. What is your job role?
Ans. 
As a Process Engineer, my job role involves designing, implementing, and optimizing industrial processes to ensure efficiency and quality.
• Designing and implementing processes to improve efficiency and quality

• Optimizing existing processes to reduce costs and increase productivity

• Troubleshooting issues and implementing solutions to improve process performance

• Collaborating with cross-functional teams to ensure smooth oper...read more
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Q8. What calculations do you perform when transferring a new product from the lab to the plant?
Ans. 
Calculations include scale-up factors, equipment sizing, material compatibility, process optimization, and cost analysis.
• Determine scale-up factors to ensure the lab process can be replicated in the plant

• Size equipment appropriately for the larger scale production

• Check material compatibility with plant equipment and process conditions

• Optimize the process parameters for efficiency and quality

• Conduct cost analysis to det
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Q9. How to calculate distillation rate?
Ans. 
Distillation rate can be calculated by dividing the amount of distillate collected by the time taken to collect it.
• Calculate the amount of distillate collected in a given time period.

• Divide the amount of distillate by the time taken to collect it to get the distillation rate.

• Express the distillation rate in units such as liters per hour or gallons per minute.
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Q1. Explain about chemical engineering thermodynamics
Ans. 
Chemical engineering thermodynamics is the study of energy and its transformations in chemical processes.
• It involves the application of thermodynamic principles to chemical systems and processes.

• It focuses on understanding and predicting the behavior of chemical reactions and the flow of energy in chemical systems.

• It helps in designing and optimizing chemical processes for efficient energy utilization.

• It includes topic...read more
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Q1. Q) Introduce about yourself
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Q2. Q) Condensor area calculation and drying time..
Ans. 
Condenser area calculation is based on heat transfer requirements and drying time depends on factors like temperature, humidity, and airflow.
• Calculate condenser area based on heat transfer requirements and desired cooling capacity

• Consider factors like temperature, humidity, and airflow when determining drying time

• Use formulas such as Q = U * A * deltaT for heat transfer calculations

• Optimize condenser design to maximize
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Q3. Q) why do we use water as major part of utility.
Ans. 
Water is used as a major part of utility due to its abundance, versatility, cost-effectiveness, and environmentally friendly properties.
• Abundance: Water is readily available in nature and can be easily sourced for various industrial processes.

• Versatility: Water can be used for a wide range of applications such as cooling, cleaning, and as a solvent.

• Cost-effectiveness: Water is relatively inexpensive compared to other u...read more
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Q1. Why am I will to relocate.
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Q1. Basic topics of plsql
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Q2. One query to fetch max n min of salary from emp table
Ans. 
Use SQL query to fetch maximum and minimum salary from emp table
• Use SELECT MAX(salary) FROM emp to fetch maximum salary

• Use SELECT MIN(salary) FROM emp to fetch minimum salary
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Q1. Performance tuning
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Q2. Indexes and exceptions used
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Indexes and exceptions are used to optimize database performance and handle errors in code.
• Indexes are used to quickly retrieve data from a database by creating a sorted list of values.

• Exceptions are used to handle errors in code and prevent the program from crashing.

• Examples: Creating indexes on frequently queried columns like 'id' or 'timestamp'. Using try-catch blocks to handle exceptions like divide by zero.
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A question expecting the prod code with out clear instructions

Q1. Buy and Sell Stock
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Q1. What solvents are used?
Ans. 
Various solvents are used in production engineering depending on the specific application, such as water, alcohols, hydrocarbons, and acids.
• Water is commonly used as a solvent for cleaning and rinsing processes.

• Alcohols like ethanol are used for dissolving oils, resins, and waxes.

• Hydrocarbons such as hexane are used for extracting oils and fats.

• Acids like sulfuric acid are used for pickling and cleaning metal surfaces.
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Q2. Chemical names asked
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Q1. Self introduced and basic knowledge in company
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Q2. 5s. Salary discuss. And dicipane.
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Q3. Old company knowledge
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Q1. Company policy and company profile
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