Zenith Energy Services Interview Questions, Process, and Tips

The calorific value of coal refers to the amount of heat energy released when a unit quantity of coal is burned.

• Calorific value is measured in units of energy per unit mass or volume.

• It is typically expressed in kilojoules per kilogram (kJ/kg) or British thermal units per pound (BTU/lb).

• The calorific value of coal can vary depending on its type and quality.

• For example, anthracite coal has a higher calorific value than ...read more

The second law of thermodynamics states that the entropy of an isolated system always increases over time.

• Entropy of a system tends to increase or remain constant in a spontaneous process.

• Heat flows from a higher temperature region to a lower temperature region.

• Efficiency of energy conversion processes is always less than 100%.

• The law explains why it is impossible to build a perpetual motion machine of the second kind.

• ...read more

Yes, I have visited a thermal power plant.

• I visited a thermal power plant during a field trip in college.

• I had the opportunity to tour the plant and learn about its operations.

• I observed the various components of the plant, such as the boiler, turbine, and generator.

• I learned about the process of converting heat energy into electrical energy.

• I also gained insights into the environmental impact and safety measures of th

Vapor cycle is a thermodynamic cycle used in refrigeration systems to transfer heat from a low-temperature region to a high-temperature region.

• Vapor cycle involves four main components: compressor, condenser, expansion valve, and evaporator.

• The cycle starts with the compressor, which increases the pressure and temperature of the refrigerant vapor.

• The high-pressure vapor then flows into the condenser, where it releases ...read more

The carbon percentage in cast iron typically ranges from 2% to 4%.

• Cast iron is a strong and brittle material made by melting iron and adding carbon.

• The carbon content in cast iron gives it its characteristic hardness and brittleness.

• Different types of cast iron can have varying carbon percentages, such as gray cast iron with 2.5-4% carbon and white cast iron with 2-3% carbon.

• Higher carbon content in cast iron results i...read more