Production Shift Incharge Interview Questions and Answers for Freshers

Unit operation refers to a single step in a process, while unit process involves a series of steps to achieve a desired outcome.

• Unit operation is a single step in a process, while unit process involves a series of steps to achieve a desired outcome.

• Unit operation is a physical or chemical change that occurs in a single step, while unit process involves a combination of unit operations.

• Examples of unit operations include filtration, distillation, and crystallization, while exa...read more

Pump is a mechanical device used to move fluids from one place to another. NPSH is the net positive suction head required and available.

• Pump is used to transfer fluids from one place to another

• NPSH is the difference between the pressure at the suction of the pump and the vapor pressure of the fluid

• NPSHr is the net positive suction head required by the pump to operate without cavitation

• NPSHa is the net positive suction head available at the suction of the pump

• NPSHa should be g...read more

Yield is the amount of usable product obtained from a manufacturing process.

• Yield is calculated by dividing the amount of usable product by the total amount of raw materials used.

• It is expressed as a percentage.

• For example, if 1000 kg of raw material is used and 900 kg of usable product is obtained, the yield would be 90%.

• Yield is an important metric for production efficiency and cost control.

Reactors are vessels used for chemical reactions. Types include batch, continuous, CSTR, PFR, and fluidized bed.

• Batch reactors are used for small-scale production and testing.

• Continuous reactors are used for large-scale production.

• CSTR (continuous stirred tank reactor) is used for homogeneous reactions.

• PFR (plug flow reactor) is used for reactions with a high degree of conversion.

• Fluidized bed reactors are used for reactions involving gases and solids.

• Examples include polymer...read more

Extraction refers to the separation of a substance from a mixture using a solvent.

• Liquid-liquid extraction

• Solid-phase extraction

• Supercritical fluid extraction

• Magnetic separation

• Chromatography