Hindustan Unilever Supply Chain Interview Questions and Answers

PID control system is used to regulate flow rate and temperature of milk in the factory.

• PID control system stands for Proportional-Integral-Derivative control system.

• It continuously monitors and adjusts the flow rate and temperature of milk.

• Proportional control component adjusts the control output based on the error between desired and actual values.

• Integral control component eliminates steady-state errors by integrating the error over time.

• Derivative control component predic...read more

Chemical engineering applications in daily life

• Cooking involves chemical reactions and temperature control

• Using cleaning products involves understanding chemical properties and safety precautions

• Personal care products like shampoo and soap are formulated using chemical engineering principles

• Understanding the chemical composition of food and drinks can help with healthy choices

• Fuel and energy production involves chemical engineering processes

• Waste management and recycling invo...read more

Bearing material is chosen based on factors like load capacity, speed, lubrication, and environmental conditions.

• Bearing materials should have high strength and hardness to withstand heavy loads.

• Materials like steel, bronze, and ceramic are commonly used for bearings.

• Steel bearings are suitable for high-speed applications and can handle heavy loads.

• Bronze bearings are self-lubricating and resistant to corrosion.

• Ceramic bearings offer high temperature resistance and are lightw...read more

A pressure cooker works by trapping steam inside a sealed pot, which raises the temperature and pressure, cooking food faster.

• Pressure cookers have a sealed lid that locks in place

• Water or other liquid is added to the pot to create steam

• The steam raises the temperature and pressure inside the pot, cooking food faster

• Pressure cookers are great for cooking tough cuts of meat or beans quickly

• They can also be used for canning fruits and vegetables

Refrigeration cycle is a process of removing heat from a space or substance and rejecting it to the environment.

• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The refrigerant is compressed by the compressor and then condensed in the condenser, releasing heat to the environment.

• The high-pressure liquid refrigerant then passes through the expansion valve, where it expands and evaporates, absorbing heat from the space or substa...read more