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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. The ratio of diameter of jet to diameter of runner is _____________
2. In Pelton turbine the energy available at inlet of runner that is at outlet of nozzle is known as
3. Among the following which turbine has least efficiency?
4. The work done per unit weight of water jet striking runner blades of Pelton turbine is given by expression ______________
5. In Pelton turbine the ratio of volume available at shaft of turbine and power supplied at the inlet of the turbine is _______
6. ____________ is obtained by dividing total rate of flow through the turbine by rate of flow through single jet.
7. The power supplied at inlet of turbine in S.I units is known as_____________
8. If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate width of buckets.
9. 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?
10. The expression for water power in Pelton wheel is ________________
11. Design of Pelton wheel means the following data is to be determined.
12. The value of coefficient of velocity is _____________
13. In most of cases the value of jet ratio is _______________
14. The hydraulic efficiency of Pelton turbine will be maximum when blade velocity is equal to _______
15. In Pelton wheel if angle of deflection is not mentioned then we assume it as______________
16. Velocity triangles are used to analyze ____________
17. Kinetic energy of jet at inlet of turbine is given as __________________
18. The expression for maximum hydraulic efficiency of Pelto turbine is given by ______________
19. In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________
20. Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
21. The depth of buckets of Pelton wheel ____________
22. In Pelton turbines the expression for power delivered at inlet to runner is given by __________
23. In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude?
24. 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 ___________
25. In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as _____________