Q. The number of pumps required by a closed heater for pumping the main feedwater stream is?

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Q. What is the purpose of using open heaters in steam power plants?

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Q. Why are closed heaters sometimes made vertical?

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Q. In the T-S diagram of a Rankine cycle, the abscissa represents?

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Q. After the expansion of throttle steam, why is some steam extracted?

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Q. The heat given up by the expansion of throttle steam is utilised in?

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Q. “Regenerative feedwater heating by turbine extraction” is often termed as?

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Q. A regenerative feedwater heating cycle with an infinite number of feedwater heaters has efficiency equal to?

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Q. In the T-S diagram, the process of heating from condenser to boiler saturation temperature when the number of turbine extraction stages are finite is?

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Q. For the process of heating from condenser to boiler saturation temperature to be reversible, the number of extraction stages involved in the entire cycle should be?

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Q. Which of the processes immediately follows the expansion of throttle steam?

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Q. The output from boiler goes to?

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Q. The area of parallelogram in the T-S diagram representing the cycle output is equal to?

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Q. What is the value of “beta” if h represents the local enthalpy on the given expansion line at a given pressure & hf is the enthalpy of saturated water at that pressure?

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Q. The expression for temperature rise t in feedwater heater when a & b are the temperatures of boiler saturation & condenser respectively, is given by which of the following expression?

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Q. What happens to the feedwater that enters the economiser?

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Q. The economiser can also be assumed as?

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Q. The feedwater in the Economiser _________

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Q. The temperature rise from condenser to boiler saturation is divided __________ among the feedwater heaters for maximum gain in efficiency.

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Q. What is the expression for enthalpy of each heater hper heater if a represents the enthalpy of heated feedwater from the economiser and b represents the enthalpy at condenser & n represents the number of heaters?

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