Fairchem Production Interview Questions and Answers

Q1. About fluid mechanics mostly . Thermodynamics. And hear transfer
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Q1. Previous experience only
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Q1. Pump design and nphs calculation
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Q2. Line size and calculation
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Q3. Manpower handling
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Q1. About Previous Experience
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Q1. Family background
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Q2. Mother father details
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Q3. Education details
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About me about my experience

Q1. Now pending 2nd round
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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?
Ans. 
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?
Ans. 
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?
Ans. 
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?
Ans. 
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. Types of distillation
Ans. 
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
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Q2. Types of pumps.
Ans. 
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.
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