Utility Mechanical Engineer Interview Questions and Answers

A boiler and power plant scheme diagram and working

• A boiler is a closed vessel in which water or other fluid is heated to generate steam

• The steam produced is used for various purposes such as power generation or heating

• A power plant consists of various components including boilers, turbines, generators, and condensers

• The boiler heats the water using fuel or electricity, converting it into steam

• The steam then passes through a turbine, causing it to rotate and generate mechanic...read more

The process of ETP/STP/RO and Humidity plant involves treating wastewater, purifying water, and controlling humidity levels.

• ETP (Effluent Treatment Plant) is used to treat industrial wastewater before it is discharged into the environment.

• STP (Sewage Treatment Plant) is used to treat domestic sewage before it is released into water bodies.

• RO (Reverse Osmosis) is a water purification process that removes impurities by forcing water through a semipermeable membrane.

• Humidity pla...read more

Refrigeration is the process of removing heat from a space, substance, or system to lower and/or maintain its temperature.

• Refrigeration involves the use of refrigerants to absorb and remove heat from a space.

• It is used in various applications such as air conditioning, food preservation, and industrial processes.

• The basic principle of refrigeration is the transfer of heat from a low temperature area to a high temperature area.

• Common refrigeration systems include vapor compress...read more

Compressor is a mechanical device that increases the pressure of a gas by reducing its volume.

• Compressors work by using a piston or a rotating impeller to decrease the volume of a gas.

• As the volume decreases, the pressure of the gas increases.

• Compressors are commonly used in refrigeration systems, air conditioning units, and industrial processes.

• Examples of compressors include reciprocating compressors, rotary screw compressors, and centrifugal compressors.