Deccan Fine Chemicals Manager Process Engineering Interview Questions and Answers

Laws governing energy and its transformations in physical systems.

• First law: Energy cannot be created or destroyed, only transferred or converted.

• Second law: Entropy of a closed system always increases over time.

• Third law: Absolute zero cannot be reached.

• Applications in engineering, physics, and chemistry.

• Examples: heat engines, refrigeration, combustion, chemical reactions.

Steam ejectors are devices that use steam to create a vacuum by entraining and compressing gases or vapors.

• Steam ejectors work by using a high-pressure steam jet to create a low-pressure zone, which draws in gases or vapors from the surrounding area.

• The entrained gases or vapors are then compressed and discharged through a diffuser, which increases their velocity and reduces their pressure.

• Steam ejectors are commonly u...read more

Heat pump is a device that transfers heat from a lower temperature to a higher temperature.

• Heat pump works on the principle of refrigeration cycle.

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

• The refrigerant absorbs heat from the low-temperature source (air, water, or ground) in the evaporator and gets converted into a gas.

• The compressor then compresses the gas, which incr...read more

Grinding is a process of removing material from a workpiece using an abrasive wheel or belt.

• Grinding is used to achieve high dimensional accuracy and surface finish.

• It is commonly used in manufacturing industries for finishing operations.

• Different types of grinding machines are used for different applications such as cylindrical, surface, and centerless grinding.

• Grinding can be done manually or with the help of compute...read more