Question 1

What is the actual turbine inlet temperature in Rankine cycle?

Accepted Answer

A) 700c 
B) 800c 
C) 550c 
D) 1150c 
A) 700c 
B) 800c 
C) 550c 
D) 1150c C

Question 2

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.

Accepted Answer

A) 1.73 m3 
B) 2.73 m3 
C) 3.73 m3 
D) 4.73 m3 
A) 1.73 m3 
B) 2.73 m3 
C) 3.73 m3 
D) 4.73 m3 D

Question 3

Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2

Accepted Answer

A) has higher thermal efficiency than the carnot cycle operating between same pressure limits 
B) has lower thermal efficiency than carnot cycle operating between same pressure limits 
C) has same thermal efficiency as carnot cycle operating between same pressure limits 
D) may be more or less depending upon the magnitudes of p1 and p2 
A) has higher thermal efficiency than the carnot cycle operating between same pressure limits 
B) has lower thermal efficiency than carnot cycle operating between same pressure limits 
C) has same thermal efficiency as carnot cycle operating between same pressure limits 
D) may be more or less depending upon the magnitudes of p1 and p2 A

Question 4

Why both reheating and regeneration is used together?

Accepted Answer

A) the effect of reheat alone on efficiency is very small 
B) regeneration has a marked effect on efficiency 
C) both of the mentioned 
D) none of the mentioned 
A) the effect of reheat alone on efficiency is very small 
B) regeneration has a marked effect on efficiency 
C) both of the mentioned 
D) none of the mentioned

Question 5

Which of the following statement is true?

Accepted Answer

A) a subcooled liquid is one which is cooled below its saturation temperature at a certain pressure 
B) subcooling is the difference between the saturation temperature and the actual liquid temperature 
C) both of the mentioned 
D) none of the mentioned 
A) a subcooled liquid is one which is cooled below its saturation temperature at a certain pressure 
B) subcooling is the difference between the saturation temperature and the actual liquid temperature 
C) both of the mentioned 
D) none of the mentioned

Question 6

Rankine cycle efficiency of a good Steam Power Plant may be in the range of?

Accepted Answer

A) 15 to 20% 
B) 35 to 45% 
C) 70 to 80% 
D) 90 to 95% 
A) 15 to 20% 
B) 35 to 45% 
C) 70 to 80% 
D) 90 to 95%

Question 7

What is the unit of Heat rate?

Accepted Answer

A) kj/kw 
B) kw/kj 
C) kj 
D) kw 
A) kj/kw 
B) kw/kj 
C) kj 
D) kw

Question 8

A piston -cylinder device contains 0.06m3 of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.

Accepted Answer

A) 0.104 kg 
B) 0.124 kg 
C) 0.134 kg 
D) 0.114 kg 
A) 0.104 kg 
B) 0.124 kg 
C) 0.134 kg 
D) 0.114 kg

Question 9

What is the effect of decrease of reheat pressure on the quality of steam at turbine exhaust?

Accepted Answer

A) decreases 
B) increases 
C) remains same 
D) none of the mentioned 
A) decreases 
B) increases 
C) remains same 
D) none of the mentioned

Question 10

For pressure ratio = 1, efficiency = 0, then?

Accepted Answer

A) reheat is used 
B) reheat is not used 
C) only reheat is used 
D) none of the mentioned 
A) reheat is used 
B) reheat is not used 
C) only reheat is used 
D) none of the mentioned

Question 11

At critical point, value of Vg-Vf is

Accepted Answer

A) two 
B) one 
C) zero 
D) infinity 
A) two 
B) one 
C) zero 
D) infinity

Question 12

Determine the specific volume of R-134a at 1 MPa and 50°C, using ideal gas equation of state.

Accepted Answer

A) 0.022325 m3/kg 
B) 0.024325 m3/kg 
C) 0.025325 m3/kg 
D) 0.026325 m3/kg 
A) 0.022325 m3/kg 
B) 0.024325 m3/kg 
C) 0.025325 m3/kg 
D) 0.026325 m3/kg

Question 13

Which of the following statement is true?

Accepted Answer

A) open heater is also known as contact-type heater 
B) in an open type heater the extracted or bled steam is allowed to mix with the feedwater 
C) in a closed heater, the fluids are not allowed to mix together 
D) all of the mentioned 
A) open heater is also known as contact-type heater 
B) in an open type heater the extracted or bled steam is allowed to mix with the feedwater 
C) in a closed heater, the fluids are not allowed to mix together 
D) all of the mentioned

Question 14

Rankine cycle comprises of

Accepted Answer

A) two isentropic processes and two constant volume processes 
B) two isentropic processes and two constant pressure processes 
C) two isothermal processes and two constant pressure processes 
D) none of the mentioned 
A) two isentropic processes and two constant volume processes 
B) two isentropic processes and two constant pressure processes 
C) two isothermal processes and two constant pressure processes 
D) none of the mentioned

Question 15

In Rankine cycle, the work output from the turbine is given by

Accepted Answer

A) change of internal energy between inlet and outlet 
B) change of enthalpy between inlet and outlet 
C) change of entropy between inlet and outlet 
D) change of temperature between inlet and outlet 
A) change of internal energy between inlet and outlet 
B) change of enthalpy between inlet and outlet 
C) change of entropy between inlet and outlet 
D) change of temperature between inlet and outlet

Question 16

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the quality.

Accepted Answer

A) 0.127 
B) 0.137 
C) 0.147 
D) 0.157 
A) 0.127 
B) 0.137 
C) 0.147 
D) 0.157

Question 17

A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work?

Accepted Answer

A) 50 
B) 60 
C) 70 
D) 80 
A) 50 
B) 60 
C) 70 
D) 80

Question 18

What is the most preferable dryness

Accepted Answer

A) 0.99 
B) 0.77 
C) 0.66 
D) 0.88 
A) 0.99 
B) 0.77 
C) 0.66 
D) 0.88

Question 19

When the temperature of a liquid is less than the saturation temperature at the given pressure, the liquid is called compressed liquid.

Accepted Answer

A) True 
 B)False

Question 20

Rankine efficiency of a Steam Power Plant

Accepted Answer

A) improves in summer as compared to that in winter 
B) improves in winter as compared to that in summer 
C) is unaffected by climatic conditions 
D) none of the mentioned 
A) improves in summer as compared to that in winter 
B) improves in winter as compared to that in summer 
C) is unaffected by climatic conditions 
D) none of the mentioned

What is the actual turbine inlet temperature in Rankine cycle?

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.

Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2

Why both reheating and regeneration is used together?

Which of the following statement is true?

Rankine cycle efficiency of a good Steam Power Plant may be in the range of?

What is the unit of Heat rate?

A piston -cylinder device contains 0.06m³ of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.

What is the effect of decrease of reheat pressure on the quality of steam at turbine exhaust?

For pressure ratio = 1, efficiency = 0, then?

At critical point, value of Vg-Vf is

Determine the specific volume of R-134a at 1 MPa and 50°C, using ideal gas equation of state.

Which of the following statement is true?

Rankine cycle comprises of

In Rankine cycle, the work output from the turbine is given by

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the quality.

A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work?

What is the most preferable dryness

When the temperature of a liquid is less than the saturation temperature at the given pressure, the liquid is called compressed liquid.

Rankine efficiency of a Steam Power Plant

Thermodynamics and Properties of Systems

Thermodynamics: Concepts and Laws

Thermodynamics and Entropy

Thermodynamics Laws, Processes, and Efficiency

Gas Laws and Thermodynamics

Thermodynamics and Gas Laws

Thermodynamics

Steam Power Plant and Rankine Cycle

Thermodynamics and Rankine Cycle

Energy and Thermodynamics

Concepts of Heat Transfer, Irreversibility, and Thermodynamic Properties

Thermodynamics and Heat Transfer

Thermodynamics and Entropy Principles

Thermodynamics and Properties of Substances

Gas Laws and Properties

Thermodynamics and Gas Mixtures: Equations, Properties, and Applications

Thermodynamics and Temperature Scales

Thermodynamics and the Second Law: Efficiency, Entropy, and Exergy

Thermodynamics and Gas Properties

Filters

Exam 15: Rankine Cycle and Properties of Steam

What is the actual turbine inlet temperature in Rankine cycle?

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.

Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2

Why both reheating and regeneration is used together?

Which of the following statement is true?

Rankine cycle efficiency of a good Steam Power Plant may be in the range of?

What is the unit of Heat rate?

A piston -cylinder device contains 0.06m3 of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.

What is the effect of decrease of reheat pressure on the quality of steam at turbine exhaust?

For pressure ratio = 1, efficiency = 0, then?

At critical point, value of Vg-Vf is

Determine the specific volume of R-134a at 1 MPa and 50°C, using ideal gas equation of state.

Which of the following statement is true?

Rankine cycle comprises of

In Rankine cycle, the work output from the turbine is given by

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the quality.

A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work?

What is the most preferable dryness

When the temperature of a liquid is less than the saturation temperature at the given pressure, the liquid is called compressed liquid.

Rankine efficiency of a Steam Power Plant

Thermodynamics and Properties of Systems

Thermodynamics: Concepts and Laws

Thermodynamics and Entropy

Thermodynamics Laws, Processes, and Efficiency

Gas Laws and Thermodynamics

Thermodynamics and Gas Laws

Thermodynamics

Steam Power Plant and Rankine Cycle

Thermodynamics and Rankine Cycle

Energy and Thermodynamics

Concepts of Heat Transfer, Irreversibility, and Thermodynamic Properties

Thermodynamics and Heat Transfer

Thermodynamics and Entropy Principles

Thermodynamics and Properties of Substances

Gas Laws and Properties

Thermodynamics and Gas Mixtures: Equations, Properties, and Applications

Thermodynamics and Temperature Scales

Thermodynamics and the Second Law: Efficiency, Entropy, and Exergy

Thermodynamics and Gas Properties

Filters

A piston -cylinder device contains 0.06m³ of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.