Prasol Chemicals Production Engineer Interview Questions and Answers

Unit operations involve physical changes in the material, while unit processes involve chemical changes.

• Unit operations involve physical processes like mixing, crushing, distillation, filtration, etc.

• Unit processes involve chemical reactions like oxidation, reduction, hydrolysis, etc.

• Unit operations are usually used in the initial stages of production, while unit processes are used in the later stages.

• Unit operations f...read more

Types of reactors include batch reactors, continuous stirred-tank reactors, plug flow reactors, and fluidized bed reactors.

• Batch reactors: Used for small-scale production and testing.

• Continuous stirred-tank reactors: Ideal for continuous production with uniform mixing.

• Plug flow reactors: Allow for efficient heat transfer and minimal back-mixing.

• Fluidized bed reactors: Suitable for high-temperature reactions and catalys

Types of agitators include paddle agitators, anchor agitators, turbine agitators, and propeller agitators.

• Paddle agitators are used for low viscosity fluids and gentle mixing.

• Anchor agitators are used for viscous fluids and provide good radial mixing.

• Turbine agitators are used for high viscosity fluids and provide high shear mixing.

• Propeller agitators are used for low viscosity fluids and provide axial flow mixing.

Gas drying is used to remove moisture from gases, while steam drying is used to remove moisture from solids or liquids.

• Gas drying involves passing a gas stream through a desiccant material to remove moisture, commonly used in natural gas processing.

• Steam drying involves using steam to evaporate moisture from solids or liquids, commonly used in food processing or paper production.

• Gas drying is more suitable for removing...read more

Heat exchangers are devices used to transfer heat between two or more fluids at different temperatures.

• Types of heat exchangers include shell and tube, plate heat exchangers, and finned tube heat exchangers.

• Shell and tube heat exchangers consist of a shell with tubes running through it, allowing one fluid to flow through the tubes while another flows over the tubes.

• Plate heat exchangers use metal plates to transfer hea...read more

I changed organizations to seek new challenges and opportunities for growth.

• I wanted to expand my skill set and take on new responsibilities.

• The previous organization did not offer the career advancement opportunities I was looking for.

• I was attracted to the new organization's reputation for innovation and success.

• The new organization provided a better work-life balance.

• I wanted to work in a different industry to broad...read more

I prefer not to disclose my current CTC. My expected CTC is based on industry standards and my experience.

• I am looking for a competitive salary based on my experience and industry standards.

• I am open to negotiation based on the job responsibilities and benefits offered.

• I am more interested in the growth opportunities and work culture of the company.

• I am willing to discuss my expected CTC in detail during the interview

Distillation is a process used to separate mixtures by heating and cooling. There are several types of distillation.

• Simple distillation: used to separate liquids with different boiling points

• Fractional distillation: used to separate liquids with similar boiling points

• Steam distillation: used to extract volatile compounds from plants

• Vacuum distillation: used to separate substances with high boiling points

• Azeotropic dist

Types of pumps include centrifugal pumps, reciprocating pumps, and rotary pumps.

• Centrifugal pumps use centrifugal force to move fluid through a rotating impeller.

• Reciprocating pumps use a piston or diaphragm to create pressure and move fluid.

• Rotary pumps use rotating mechanisms to transfer fluid, such as gear pumps or vane pumps.