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Hydraulic Machines Practice Test: Pelton Turbine
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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. In Pelton wheel, if outlet velocity angle of jet is “acute angled” then outlet whirl velocity of jet is ______________
2. In Pelton wheel, if outlet velocity angle of jet is “right angled” then outlet whirl velocity of jet is __________
3. In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as _______
4. 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 ___________
5. Design of Pelton wheel means the following data is to be determined.
6. Tangential velocity of blade of Pelton wheel is proportional to ____________
7. Calculate work done by jet per second on the runner where, discharge=0.7cubic meters/s, inlet and outlet whirl velocities be 23.77 and 2.94?
8. In which of following turbine inlet and outlet blade velocities of vanes are equal?
9. In Pelton ____________ is ratio of volume of water actually striking the runner and volume of water supplied to turbine.
10. In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________
11. The depth of buckets of Pelton wheel ____________
12. The ratio of pitch diameter of Pelton wheel to diameter of jet is known as ___________
13. Velocity triangles are used to analyze ____________
14. In Pelton turbine runner power is more when compared with power available at exit of nozzle.
15. Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
16. In Pelton turbines the expression for power delivered at inlet to runner is given by __________
17. In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude?
18. Kinetic energy of jet at inlet of turbine is given as __________________
19. In Pelton turbine ___________ is defined as ratio between power delivered to runner and power supplied at inlet of turbine.
20. The power supplied at inlet of turbine in S.I units is known as_____________
21. In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is _____________
22. The work done per unit weight of water jet striking runner blades of Pelton turbine is given by expression ______________
23. In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as _____________
24. Among the following which turbine has least efficiency?
25. The maximum efficiency of Pelton turbine is _________