DES Private Limited Interview Questions and Answers

Conventional power plants use fossil fuels to generate electricity while non-conventional power plants use renewable sources.

• Conventional power plants burn fossil fuels like coal, oil, and natural gas to generate electricity

• Non-conventional power plants use renewable sources like solar, wind, hydro, and geothermal energy

• Conventional power plants are cheaper to build and operate but contribute to pollution and climate change

• Non-conventional power plants are more expensive to b...read more

Thermal power plant generates electricity by converting heat energy into electrical energy.

• Fuel is burned to produce heat

• Heat is used to produce steam

• Steam drives the turbine

• Turbine drives the generator

• Generator produces electricity

• Examples: coal-fired power plant, gas-fired power plant, nuclear power plant

Thermal power plants use fossil fuels to generate electricity. They have advantages and disadvantages.

• Advantages: Reliable source of electricity, low operating cost, high efficiency, easy to operate and maintain

• Disadvantages: High initial cost, environmental pollution, non-renewable source of energy, limited availability of fuel

• Example: Advantages - Thermal power plants provide a reliable source of electricity that can be generated 24/7. They have low operating costs and high...read more

Co-Generation plants are power plants that produce both electricity and useful heat simultaneously.

• Co-Generation plants are also known as Combined Heat and Power (CHP) plants.

• They use a single fuel source to generate both electricity and heat.

• The heat produced during electricity generation is captured and used for heating buildings or industrial processes.

• Co-Generation plants are more efficient than traditional power plants because they utilize the waste heat that is normally...read more

Tariff is a tax imposed on imported or exported goods. It is analyzed based on the type of goods and the country of origin/destination.

• Tariff is a form of protectionism used by governments to protect domestic industries from foreign competition.

• Tariffs can be specific (fixed amount per unit) or ad valorem (percentage of the value of the goods).

• Tariffs can also be used as a tool for diplomacy, by imposing tariffs on countries that do not comply with certain policies or agreeme...read more

Boilers are classified into different types based on their design, fuel type, and usage.

• Fire-tube boilers

• Water-tube boilers

• Electric boilers

• Gas boilers

• Oil boilers

• Combination boilers

• Condensing boilers

• Solid fuel boilers

Velocity and pressure compounding involves combining multiple stages of turbines or compressors to increase efficiency.

• Velocity compounding involves converting pressure energy into kinetic energy in multiple stages of turbines.

• Pressure compounding involves reducing pressure in multiple stages of compressors to increase efficiency.

• Combining both velocity and pressure compounding can significantly improve the overall efficiency of a system.

• Examples include steam turbines and mu...read more