Rankine Cycle: Master the Fundamentals of Steam Power Plants

Question 1

Which component is **not** found in the Rankine cycle?

Accepted Answer

Compressor

Answer

Boiler

Answer

Turbine

Answer

Condenser

Question 2

What is the primary purpose of the condenser in the Rankine cycle?

Accepted Answer

To condense steam back into water

Answer

To convert water into high-pressure steam

Answer

To generate electricity

Answer

To expand steam and produce mechanical work

Question 3

What is the theoretical maximum efficiency of a Rankine cycle operating between two specified temperatures?

Accepted Answer

Carnot efficiency

Answer

Brayton efficiency

Answer

Otto efficiency

Answer

Diesel efficiency

Question 4

How does reheating affect the efficiency of a Rankine cycle?

Accepted Answer

Increases efficiency

Answer

Decreases efficiency

Answer

No effect on efficiency

Answer

Only used in subcritical Rankine cycles

Question 5

What is the primary function of a steam turbine in a Rankine cycle?

Accepted Answer

Convert thermal energy into mechanical energy

Answer

Compress the working fluid

Answer

Heat the working fluid

Answer

Condense the working fluid

Question 6

Which of the following is **not** a type of Rankine cycle modification?

Accepted Answer

Diesel cycle

Answer

Reheat cycle

Answer

Regenerative cycle

Answer

Combined cycle

Question 7

What is the significance of the critical point in a Rankine cycle?

Accepted Answer

Determines the maximum pressure and temperature limits

Answer

Represents the point where the working fluid changes phase

Answer

Is the point of highest efficiency in the cycle

Answer

Has no significance in the Rankine cycle

Question 8

What is the main advantage of using supercritical steam in a Rankine cycle?

Accepted Answer

Increased thermal efficiency

Answer

Reduced turbine size

Answer

Elimination of the need for a condenser

Answer

Lower operating costs

Question 9

How does increasing the condenser pressure impact the efficiency of a Rankine cycle?

Accepted Answer

Decreases efficiency

Answer

Increases efficiency

Answer

No impact on efficiency

Answer

Depends on other cycle parameters

Question 10

What is the primary function of the boiler in the Rankine cycle?

Accepted Answer

To convert high-pressure water into steam

Answer

To condense steam into water

Answer

To expand steam to generate power

Answer

To preheat the feedwater before entering the boiler

Question 11

Which process in the Rankine cycle involves the expansion of steam to generate power?

Accepted Answer

Isentropic expansion

Answer

Isobaric expansion

Answer

Adiabatic expansion

Answer

Isothermal expansion

Question 12

What is the theoretical maximum efficiency of a Rankine cycle operating between two specified temperatures?

Accepted Answer

Carnot efficiency

Answer

Brayton efficiency

Answer

Stirling efficiency

Answer

Diesel efficiency

Question 13

Which type of condenser is commonly employed in Rankine cycle applications?

Accepted Answer

Surface condenser

Answer

Jet condenser

Answer

Evaporative condenser

Answer

Direct contact condenser

Question 14

What is the primary purpose of a feedwater heater in a Rankine cycle?

Accepted Answer

To preheat the feedwater before entering the boiler

Answer

To condense the steam exiting the turbine

Answer

To generate additional power

Answer

To reduce the pressure of the steam entering the turbine

Question 15

Identify the component that is NOT a part of a Rankine cycle.

Accepted Answer

Compressor

Answer

Boiler

Answer

Condenser

Answer

Turbine

Question 16

Which process involves the transformation of steam into a liquid?

Accepted Answer

Condensation

Answer

Evaporation

Answer

Expansion

Answer

Compression

Question 17

What is the primary function of the condenser in a Rankine cycle?

Accepted Answer

Condensing the working fluid into a liquid

Answer

Heating the working fluid

Answer

Expanding the working fluid

Answer

Compressing the working fluid

Question 18

Which ideal gas is often used to approximate the behavior of steam in a Rankine cycle?

Accepted Answer

Air

Answer

Nitrogen

Answer

Carbon dioxide

Answer

Helium

Question 19

Describe the role of the pump in a Rankine cycle.

Accepted Answer

Increases working fluid pressure

Answer

Circulates the working fluid

Answer

Removes heat from the working fluid

Answer

Adds heat to the working fluid

Question 20

In the Rankine cycle, how does an increase in pressure ratio impact the cycle's thermal efficiency?

Accepted Answer

Increases thermal efficiency

Answer

Decreases thermal efficiency

Answer

No effect on thermal efficiency

Answer

Efficiency first increases and then decreases

Question 21

How does increasing condenser pressure affect the efficiency and power output of a Rankine cycle power plant?

Accepted Answer

Efficiency decreases, power output decreases.

Answer

Efficiency increases, power output decreases.

Answer

Efficiency and power output remain unchanged.

Answer

Efficiency increases, power output increases.

Question 22

Which of the following is not a component of a Rankine cycle?

Accepted Answer

Compressor

Answer

Boiler

Answer

Condenser

Answer

Pump

Question 23

What is the primary purpose of the condenser in a Rankine cycle?

Accepted Answer

To condense steam into water

Answer

To generate steam

Answer

To cool the steam

Answer

To heat the water

Question 24

Which of the following is the common working fluid used in Rankine cycle power plants?

Accepted Answer

Water

Answer

Refrigerant

Answer

Ammonia

Answer

Natural gas

Question 25

What is the function of the feedwater heater in a Rankine cycle?

Accepted Answer

Preheat the boiler feedwater

Answer

Extract heat from the condenser

Answer

Reduce the pressure of the steam

Answer

Increase the temperature of the steam

Question 26

What is the purpose of the reheater in a reheat cycle?

Accepted Answer

Increase steam temperature

Answer

Reduce steam pressure

Answer

Cool the steam

Answer

Condense the steam

Question 27

Which component is **NOT** part of the Rankine cycle?

Accepted Answer

Compressor

Answer

Turbine

Answer

Condenser

Answer

Pump

Question 28

Which process in the Rankine cycle involves an adiabatic expansion?

Accepted Answer

Turbine

Answer

Condenser

Answer

Pump

Answer

Boiler

Question 29

What is the theoretical maximum efficiency of the Rankine cycle?

Accepted Answer

Carnot efficiency

Answer

Brayton efficiency

Answer

Otto efficiency

Answer

Diesel efficiency

Question 30

What is the distinguishing characteristic between a wet steam turbine and a dry steam turbine?

Accepted Answer

Wet steam turbines operate with water droplets in the steam, unlike dry steam turbines.

Answer

Dry steam turbines operate at higher pressures than wet steam turbines.

Answer

Wet steam turbines are more efficient than dry steam turbines.

Answer

There is no difference between wet steam turbines and dry steam turbines.

Question 31

What is a key advantage of using superheated steam in the Rankine cycle?

Accepted Answer

Increased turbine efficiency

Answer

Reduced condenser size

Answer

Higher boiler pressure

Answer

Lower operating costs

Question 32

What is the purpose of reheating steam in the Rankine cycle?

Accepted Answer

To raise the steam's temperature and improve turbine efficiency

Answer

To reduce the moisture content of the steam

Answer

To increase the steam's pressure

Answer

To decrease the steam's volume

Question 33

What is the primary function of the boiler in the Rankine cycle?

Accepted Answer

To heat water and convert it into high-pressure steam

Answer

To cool steam and condense it into water

Answer

To pressurize steam for use in the turbine

Answer

To expand steam to produce power

Question 34

Which process in the Rankine cycle involves the expansion of steam through a turbine?

Accepted Answer

Isentropic expansion in the turbine

Answer

Isobaric heat addition in the boiler

Answer

Isothermal heat rejection in the condenser

Answer

Adiabatic compression in the pump

Question 35

What is the theoretical maximum efficiency of the Rankine cycle?

Accepted Answer

Carnot efficiency

Answer

Otto efficiency

Answer

Diesel efficiency

Answer

Stirling efficiency

Question 36

Which of the following factors does NOT affect the efficiency of the Rankine cycle?

Accepted Answer

Environmental temperature

Answer

Boiler pressure

Answer

Condenser temperature

Answer

Turbine efficiency

Question 37

What is the predominant application of the Rankine cycle?

Accepted Answer

Power generation in thermal power plants

Answer

Refrigeration

Answer

Air conditioning

Answer

Heat pumping

Question 38

What advantage does using superheated steam provide in the Rankine cycle?

Accepted Answer

Increased efficiency due to higher steam temperature and reduced moisture content

Answer

Reduced turbine size

Answer

Lower condenser pressure

Answer

Improved environmental performance

Question 39

What is the primary function of the boiler in the Rankine cycle?

Accepted Answer

Convert water into steam

Answer

Condense steam into water

Answer

Expand steam to generate power

Answer

Compress steam

Question 40

Which process in the Rankine cycle is responsible for power generation?

Accepted Answer

Expansion of steam in the turbine

Answer

Heat addition in the boiler

Answer

Heat rejection in the condenser

Answer

Compression of steam

Question 41

What is the theoretical efficiency limit of the Rankine cycle known as?

Accepted Answer

Carnot efficiency

Answer

100%

Answer

50%

Answer

Dependent on boiler and condenser pressures

Question 42

Which type of turbine design is most commonly utilized in Rankine cycle power plants?

Accepted Answer

Axial turbine

Answer

Impulse turbine

Answer

Reaction turbine

Answer

Centrifugal turbine

Question 43

What is the primary role of the condenser in the Rankine cycle?

Accepted Answer

Condense steam into water

Answer

Generate steam

Answer

Expand steam

Answer

Compress steam

Question 44

What is the primary working fluid employed in the Rankine cycle?

Accepted Answer

Steam

Answer

Water

Answer

Air

Answer

Refrigerant

Question 45

Which element in the Rankine cycle is used to convert the thermal energy of steam into mechanical energy?

Accepted Answer

Turbine

Answer

Condenser

Answer

Pump

Answer

Boiler

Question 46

In the Rankine cycle, what is the primary function of the condenser?

Accepted Answer

To condense steam back into liquid water

Answer

To vaporize water into steam

Answer

To expand steam and generate power

Question 47

Which process in the Rankine cycle involves the addition of heat to water to convert it into steam?

Accepted Answer

Boiler process

Answer

Pump process

Answer

Turbine process

Answer

Condenser process

Question 48

What is the theoretical maximum efficiency limit of the Rankine cycle based on the Carnot principle?

Accepted Answer

Carnot efficiency

Answer

Brayton efficiency

Answer

Diesel efficiency

Answer

Otto efficiency

Question 49

What is the primary application of the Rankine cycle in power generation?

Accepted Answer

Power generation in steam power plants

Answer

Heating systems

Answer

Air conditioning systems

Answer

Refrigeration systems

Question 50

What is the purpose of incorporating a feedwater heater into a Rankine cycle setup?

Accepted Answer

To enhance the overall cycle efficiency

Answer

To lubricate moving components

Answer

To regulate steam flow

Answer

To reduce steam temperature

Question 51

What is the primary purpose of a superheater in a Rankine cycle system?

Accepted Answer

To elevate the temperature of steam

Answer

To increase steam pressure

Answer

To condense steam

Answer

To reduce steam moisture content