Steam Power Plant and Rankine Cycle Questions

What is the primary function of a closed feedwater heater in a steam power plant?

• To mix steam and feedwater

• To transfer heat from extracted steam to feedwater without mixing

• To increase the pressure of the feedwater

• To reduce the temperature of the steam

In an ideal closed feedwater heater, what is the condition of the extracted steam as it leaves the heater?

• Superheated vapor

• Saturated liquid

• Subcooled liquid

• Wet vapor

What is the purpose of a trap in a steam power plant?

• A) To mix steam and water

• B) To throttle liquid to a lower pressure while trapping vapor

• C) To increase the enthalpy of the steam

• D) To reduce the temperature of the feedwater

In the regenerative Rankine cycle, what is the effect of increasing the number of feedwater heaters?

• Decreases thermal efficiency

• Increases thermal efficiency

• No effect on thermal efficiency

• Increases the work output of the turbine

In the reheat-regenerative Rankine cycle, what is the purpose of reheating the steam?

• To increase the pressure of the steam

• To increase the temperature of the steam before it enters the low pressure turbine

• To reduce the moisture

• To reduce the work output of the turbine

What is the primary purpose of cogeneration in industrial applications?

• To generate electricity only

• To utilize latent heat for heating and drying, and to generate power

• To reduce the pressure of steam

• To increase the temperature of steam

Which of the following industries commonly uses cogeneration?

• Paper mills

• Textile mills

• Chemical factories

• All of the above

In a cogeneration plant, what is the purpose of the heat exchanger?

• To generate electricity

• To supply heat for district heating

• To increase the pressure of steam

• To reduce the temperature of steam

What is the primary purpose of regeneration in a steam power plant?

• To increase the pressure of the steam

• To reduce the amount of heat added in the low-temperature region

• To decrease the temperature of the feedwater

• To increase the work output of the turbine

In a regenerative Rankine cycle, what is the device used to heat the feedwater called?

• Condenser

• Turbine

• Feedwater heater (FWH)

• Boiler