Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  A steam turbine receives steam steadily at 10... Start Learning for Free
A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal to
  • a)
    0 kJ    
  • b)
    50 kJ
  • c)
    150 kJ    
  • d)
    250 kJ
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A steam turbine receives steam steadily at 10 bar with an enthalpy of ...
Given that
h1= 3000 kJ/kg
h2 = 2700 kJ/kg
W = 350 kJ/kg
Using steady state energy equation, h1 = h+ W + Q
3000 = 2700 + 250 + Q
Q = 50 kJ
View all questions of this test
Most Upvoted Answer
A steam turbine receives steam steadily at 10 bar with an enthalpy of ...
Understanding the Problem
In this scenario, we are analyzing the performance of a steam turbine. The steam enters at a high pressure and enthalpy, and exits at a lower pressure and enthalpy.
Key Parameters
- Inlet Conditions:
- Pressure: 10 bar
- Enthalpy: 3000 kJ/kg
- Outlet Conditions:
- Pressure: 1 bar
- Enthalpy: 2700 kJ/kg
- Work Output: 250 kJ/kg
Applying the First Law of Thermodynamics
The first law states that the energy added to the system minus the energy leaving the system equals the change in internal energy. In this case, since kinetic and potential energy changes are negligible, we can express the first law as:
Energy In - Energy Out = Work Done + Heat Transfer
Calculating Energy In and Out
- Energy In:
- Enthalpy in: 3000 kJ/kg
- Energy Out:
- Enthalpy out: 2700 kJ/kg
- Work output: 250 kJ/kg
Using the first law:
Energy In - (Energy Out + Work Output) = Heat Transfer
Substituting the values:
3000 kJ/kg - (2700 kJ/kg + 250 kJ/kg) = Heat Transfer
Calculating Heat Transfer
- Energy Out Total:
- 2700 kJ/kg + 250 kJ/kg = 2950 kJ/kg
- Heat Transfer Calculation:
- 3000 kJ/kg - 2950 kJ/kg = 50 kJ
Conclusion
The heat transfer from the turbine casing to the surroundings is 50 kJ. Thus, the correct answer is option B) 50 kJ.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
Explore Courses for Mechanical Engineering exam

Similar Mechanical Engineering Doubts

Top Courses for Mechanical Engineering

A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer?
Question Description
A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer?.
Solutions for A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A steam turbine receives steam steadily at 10 bar with an enthalpy of 3000 kj/kg and discharges at 1 bar with an enthalpy of 2700 kj/kg. The work output is 250 kJ/kg. The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal toa)0 kJ b)50 kJc)150 kJ d)250 kJCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev