Archean Chemical Industries Production Interview Questions and Answers

Q1. Unit operation and Unit Processes?
Ans. 
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
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Q2. Types of Reactors?
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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
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Q1. Types of Agitators?
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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.
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Q2. Gas Drying vs Steam drying?
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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
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Q1. Heat exchangers and its types?
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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
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Q1. Manpower handling.
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Q2. Relationship among employees.
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Q1. Production process.
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Q2. Technical terms like OEE, OTIF, 3M, 5S, RCA, CAPA, etc.
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Q2. Station mapping of workers
Ans. 
Station mapping of workers involves assigning specific tasks or roles to workers based on their skills and abilities.
• Station mapping is the process of organizing and assigning workers to specific stations or work areas.

• It helps optimize productivity and efficiency by ensuring that workers are assigned tasks that align with their skills and abilities.

• Station mapping can be done based on factors such as worker experience...read more
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Q1. Plant overview and process of the plant
Ans. 
The plant is a manufacturing facility that produces products through a series of processes.
• The plant has multiple production lines that operate simultaneously

• Raw materials are received and stored in the warehouse before being processed

• The production process involves mixing, heating, cooling, and packaging

• Quality control checks are performed at various stages of the process

• Finished products are stored in the finished go
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