Dhariwal Infrastructure Interview Questions, Process, and Tips

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• No data available on the calorific value of coal used in the previous plant.

Heat rate is the amount of fuel energy required to produce a unit of electricity. It is inversely related to efficiency.

• Heat rate is a measure of the efficiency of a power plant.

• It is calculated by dividing the energy content of the fuel by the amount of electricity generated.

• A lower heat rate indicates a more efficient power plant.

• Heat rate is affected by factors such as the type of fuel used, the age of the plant, an...read more

Supercritical boilers operate at a higher temperature and pressure than subcritical boilers, resulting in higher efficiency.

• Supercritical boilers use water above its critical point, where there is no distinction between liquid and gas phases

• Subcritical boilers operate below the critical point of water

• Supercritical boilers have higher thermal efficiency and require less fuel to produce the same amount of energy

• Supercrit...read more

Coal is fired in the boiler at a temperature of around 350-400 degrees Celsius. Parameters to be looked into include coal quality, moisture content, and particle size.

• Coal is typically fired in the boiler at a temperature of around 350-400 degrees Celsius

• Parameters to be looked into before firing coal include coal quality, moisture content, and particle size

• Coal quality can affect the efficiency of the boiler and the e...read more

I would immediately isolate the steam supply and release the pressure from the gauge glass flange joint.

• Isolate the steam supply to prevent further leakage

• Release the pressure from the gauge glass flange joint

• Notify the maintenance team to repair the leak

• Ensure safety measures are followed during the repair process

Water quality parameters and steam quality are crucial for filling a boiler.

• Water quality parameters include pH, dissolved oxygen, total dissolved solids, and alkalinity.

• Steam quality is measured by the percentage of moisture in the steam.

• Maintaining steam quality is important for efficient operation and preventing damage to the boiler.

• Steam quality can be improved by ensuring proper water treatment and regular mainten...read more