Chemical engineering interview questions

‍Q1. What is Chemical Engineering?
A1. Chemical engineering is the branch of engineering that deals with the design, development, and operation of processes that transform raw materials into useful products.

Q2. What are some common unit operations in chemical engineering?
A2. Some common unit operations in chemical engineering include distillation, filtration, evaporation, crystallization, and drying.

Q3. What is a process flow diagram?
A3. A process flow diagram (PFD) is a diagram that shows the basic flow of a chemical process, including the major equipment and process streams.

Q4. What is a P&ID?
A4. A P&ID (piping and instrumentation diagram) is a detailed diagram that shows the piping, equipment, and instrumentation of a chemical process.

Q5. What is a mass balance?
A5. A mass balance is a calculation that accounts for all the inputs and outputs of a chemical process, and ensures that mass is conserved.

Q6. What is a heat balance?
A6. A heat balance is a calculation that accounts for all the heat inputs and outputs of a chemical process, and ensures that energy is conserved.

Q7. What is a reactor?
A7. A reactor is a vessel or device in which a chemical reaction takes place.

Q8. What is a catalyst?
A8. A catalyst is a substance that increases the rate of a chemical reaction without being consumed itself.

Q9. What is a distillation column?
A9. A distillation column is a tall tower used to separate a mixture of liquids by distillation.

Q10. What is a heat exchanger?
A10. A heat exchanger is a device used to transfer heat from one fluid to another without the fluids mixing.

Q11. What is a pump?
A11. A pump is a device used to move fluids from one location to another.

Q12. What is a compressor?
A12. A compressor is a device used to increase the pressure of a gas.

Q13. What is a filter?
A13. A filter is a device used to remove solid particles from a fluid.

Q14. What is a centrifuge?
A14. A centrifuge is a device used to separate components of a mixture by spinning them at high speeds.

Q15. What is a dryer?
A15. A dryer is a device used to remove moisture from a material.

Q16. What is a reactor vessel?
A16. A reactor vessel is a container used to hold the materials for a chemical reaction.

Q17. What is a scrubber?
A17. A scrubber is a device used to remove pollutants from a gas stream.

Q18. What is a relief valve?
A18. A relief valve is a safety device that opens automatically to relieve excess pressure in a vessel.

Q19. What is a safety valve?
A19. A safety valve is a device that opens automatically to release excess pressure in a vessel to prevent it from exploding.

Q20. What is a solenoid valve?
A20. A solenoid valve is an electrically controlled valve that opens and closes a fluid flow path.

Q21. What is a steam trap?
A21. A steam trap is a device used to remove condensate from a steam system.

Q22. What is a thermocouple?
A22. A thermocouple is a device used to measure temperature.

Q23. What is a pressure gauge?
A23. A pressure gauge is a device used to measure the pressure of a fluid.

Q24. What is a flow meter?
A24. A flow meter is a device used to measure the flow rate of a fluid.

Q25. What is a level transmitter?
A25. A

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Q25. What is a level transmitter?
A25. A level transmitter is a device used to measure the level of a liquid or solid material in a tank or vessel.

Q26. What is a PLC?
A26. A PLC (programmable logic controller) is a computer-based system used to control industrial processes.

Q27. What is a DCS?
A27. A DCS (distributed control system) is a computer-based system used to control complex industrial processes.

Q28. What is a PID controller?
A28. A PID (proportional-integral-derivative) controller is a control loop feedback mechanism used in industrial control systems.

Q29. What is a batch process?
A29. A batch process is a manufacturing process that produces a finite quantity of product in one cycle.

Q30. What is a continuous process?
A30. A continuous process is a manufacturing process that produces a product without interruption.

Q31. What is a polymer?
A31. A polymer is a large molecule made up of repeating units called monomers.

Q32. What is a reactor design?
A32. A reactor design is the process of designing the vessel or device in which a chemical reaction will take place.

Q33. What is a process control?
A33. Process control is the application of technology to control the parameters of a manufacturing process, such as temperature, pressure, and flow rate.

Q34. What is a process simulation?
A34. Process simulation is the use of computer software to model and simulate a chemical process, in order to optimize the process and improve its efficiency.

Q35. What is a process optimization?
A35. Process optimization is the process of improving a manufacturing process to increase efficiency and reduce costs.

Q36. What is a process safety?
A36. Process safety is the management of risks associated with the manufacture, handling, and use of hazardous chemicals.

Q37. What is a process economics?
A37. Process economics is the study of the costs and benefits of a chemical process, including capital costs, operating costs, and revenues.

Q38. What is a chemical reactor engineering?
A38. Chemical reactor engineering is the branch of chemical engineering that deals with the design, optimization, and operation of chemical reactors.

Q39. What is a distillation design?
A39. Distillation

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