Reliance Chemical Products Process Engineer Interview Questions and Answers

NPSH stands for Net Positive Suction Head in a centrifugal pump.

• NPSH is a measure of how much suction pressure is required at the pump inlet to prevent cavitation.

• It is important to ensure that the NPSH available (NPSHa) is greater than the NPSH required (NPSHr) for the pump to operate efficiently.

• NPSH is affected by factors such as pump speed, fluid properties, and system design.

• Cavitation can occur if the NPSH availa...read more

Distillation is a separation process that involves heating a liquid mixture to create vapor and then cooling the vapor to get a purified liquid.

• Types of distillation include simple distillation, fractional distillation, and steam distillation.

• Simple distillation is used for separating components with large boiling point differences.

• Fractional distillation is used for separating components with closer boiling points.

• Ste...read more

Types of impellers in centrifugal pumps include closed, open, semi-open, and vortex.

• Closed impeller: all flow enters and exits through the impeller blades

• Open impeller: flow enters through the center and exits along the blades

• Semi-open impeller: flow enters through the eye and exits along the blades

• Vortex impeller: flow enters through the eye and exits through the periphery

• Impeller selection depends on the application

Different types of Pressure Safety Valves (PSVs) and factors to consider when selecting them

• Types of PSVs include conventional, balanced bellows, pilot-operated, and rupture disc

• Factors to consider when selecting a PSV include set pressure, relieving capacity, back pressure, and operating temperature

• Conventional PSVs are commonly used for low to medium pressure applications, while pilot-operated PSVs are suitable for h...read more

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

• Shell and tube heat exchangers

• Plate heat exchangers

• Double pipe heat exchangers

• Spiral heat exchangers

• Air-cooled heat exchangers

Cooling tower is a heat rejection device that removes waste heat from a process system.

• It works on the principle of evaporative cooling

• Water is circulated through the tower and is exposed to air, which causes some of the water to evaporate

• The heat from the process system is transferred to the water, which is then released into the atmosphere

• The cooled water is then recirculated back into the process system

• The tower can...read more

I have applied my knowledge of chemical engineering principles in designing and optimizing manufacturing processes by analyzing reaction kinetics, heat transfer, and mass transfer.

• Utilizing reaction kinetics to determine optimal reaction conditions for maximum yield

• Applying heat transfer principles to design efficient heat exchangers for temperature control

• Optimizing mass transfer processes to improve separation effici...read more

Heat duty is the amount of heat energy required or removed in a process.

• Heat duty is a measure of the amount of heat energy needed to be added or removed in a process.

• It is typically measured in units such as BTU/hr or kW.

• Heat duty calculations are important in designing and optimizing heat exchangers, reactors, and other process equipment.

• For example, in a distillation column, the heat duty would refer to the amount o...read more