Wednesday, February 7, 2024

Important Questions - Unit IV: Turbines

 1. Explain the general layout of hydro-electric plant with the help of a neat sketch and also explain the terms gross head and net head.


2. How are hydraulic turbines classified?


3. Give the comparison between impulse and reaction turbines. 


4. What is a pelton wheel? Explain its construction and working with a neat sketch. 


5. Draw the inlet and outlet velocity diagram for a pelton wheel. Obtain an expression for work done and hydraulic efficiency and also derive the expression for maximum hydraulic efficiency


6. What is the basis of selection of turbine at a particular application.


7. Explain the various efficiency of hydraulic turbines


8. Derive an expression for specific speed. What is the significance of turbine 


9. List out the various types of reaction turbines and describe any one type in detail


10. Define the term speed ratio, flow ratio and jet ratio..


11. Explain the principle of operation of a Francis turbine. Give its characteristics. 


12. Explain with sketch the principle of operation of a Kaplan turbine and give its characteristics and also compare merits and demerits of other turbines.


13. Discuss about construction details of Kaplan turbine with a neat sketch.


14. Discuss about draft tube and its types


15. Define cavitation. What are the effects of cavitation?


16. Mention three to four most striking character of pelton wheel. Francis turbine and Kaplan turbine.


17. Explain in detail performance curve of turbine


18. With the help of neat sketch explain the governing mechanism for pelton wheel.


19. Differentiate between inward flow and outward flow reaction turbine.


20. Differentiate between francis turbine and Kaplan turbine.


21. Explain the governing mechanism of reaction turbines.

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