mcq chapter 2

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

• oA) To mix steam and feedwater

• oB) To transfer heat from extracted steam to feedwater without mixing

• oC) To increase the pressure of the feedwater

• oD) 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?

• o A) Superheated vapor

• o B) Saturated liquid

• o C) Subcooled liquid

• o D) Wet vapor

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

• o A) To mix steam and water

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

• o C) To increase the enthalpy of the steam

• o D) To reduce the temperature of the feedwater

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

• o A) Decreases thermal efficiency

• o B) Increases thermal efficiency

• o C) No effect on thermal efficiency

• o D) Increases the work output of the turbine

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

• o A) To increase the pressure of the steam

• o B) To increase the temperature of the steam before it enters the low-pressure turbine

• o C) To reduce the moisture content in the low-pressure turbine

• o D) To reduce the work output of the turbine

What is the primary purpose of cogeneration in industrial applications?

• o A) To generate electricity only

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

• o C) To reduce the pressure of steam

• o D) To increase the temperature of steam

Which of the following industries commonly uses cogeneration?

• o A) Paper mills

• o B) Textile mills

• o C) Chemicalfactories

• o D) All of the above

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

• o A) To generate electricity

• o B) To supply heat for district heating

• o C) To increase the pressure of steam

• o D) To reduce the temperature of steam

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

• o A) To increase the pressure of the steam

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

• o C) To decrease the temperature of the feedwater

• o D) To increase the work output of the turbine

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

• o A) Condenser

• o B) Turbine

• o C) Feedwater heater (FWH)

• o D) Boiler