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Hydraulic Machines Practice Test: Pelton Turbine
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Avg score: 58% Most missed: “In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), wher…”
Pelton Turbine topics include: Pelton turbine velocity diagrams, pelton turbines work, pelton turbine efficiency and pelton wheel design. A Pelton turbine is a type of hydroelectric turbine that converts water's kinetic energy into mechanical energy. Lester A. Pelton invented it in 1880 during the gold rush.  Pelton turbines are used in hydroelectric plants to generate electricity. They are suitable for sites with heads greater than 300 meters and when water energy is available at high head and low flow rate.  Pelton turbines are characterized by their spoon-shaped buckets that capture the... Show more
Hydraulic Machines Practice Test: Pelton Turbine
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25 Questions

1. If diameter of jet is 85mm and diameter of runner is 1.5 meter then depth of buckets is ___________
2. The number of buckets of Pelton wheel is 25 and diameter of runner is 1.5meters then calculate diameter of jet is ___________
3. In Pelton turbine inlet velocity of jet is 85.83m/s, inlet and outlet whirl velocities be 85.83 and 0.143 and blade velocity be 38.62 then its hydraulic efficiency is ___________
4. In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________
5. In Pelton wheel, if outlet velocity angle of jet is “acute angled” then outlet whirl velocity of jet is ______________
6. The expression for maximum hydraulic efficiency of Pelto turbine is given by ______________
7. Design of Pelton wheel means the following data is to be determined.
8. In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is _____________
9. The power supplied at inlet of turbine in S.I units is known as_____________
10. If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate number of buckets on Pelton wheel approximately
11. In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude?
12. In Pelton turbine the ratio of volume available at shaft of turbine and power supplied at the inlet of the turbine is _______
13. The width of Pelton wheel should be 5 times the diameter of jet?
14. Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
15. In most of cases the value of jet ratio is _______________
16. In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as _______
17. The hydraulic efficiency of Pelton turbine will be maximum when blade velocity is equal to _______
18. If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate width of buckets.
19. The value of coefficient of velocity is _____________
20. In Pelton ____________ is ratio of volume of water actually striking the runner and volume of water supplied to turbine.
21. In Pelton wheel, if outlet velocity angle of jet is “right angled” then outlet whirl velocity of jet is __________
22. In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as _____________
23. In Pelton turbine hydraulic efficiency is product of mechanical efficiency and overall efficiency.
24. Kinetic energy of jet at inlet of turbine is given as __________________
25. In Pelton turbine the energy available at inlet of runner that is at outlet of nozzle is known as