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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. The expression for hydraulic efficiency is given by
2. In Pelton turbine hydraulic efficiency is product of mechanical efficiency and overall efficiency.
3. Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
4. ____________ is obtained by dividing total rate of flow through the turbine by rate of flow through single jet.
5. The expression for water power in Pelton wheel is ________________
6. In Pelton turbine the energy available at inlet of runner that is at outlet of nozzle is known as
7. In most of cases the value of jet ratio is _______________
8. In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as _____________
9. In Pelton wheel if angle of deflection is not mentioned then we assume it as______________
10. The ratio of pitch diameter of Pelton wheel to diameter of jet is known as ___________
11. In Pelton ____________ is ratio of volume of water actually striking the runner and volume of water supplied to turbine.
12. 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?
13. The number of buckets of Pelton wheel is 25 and diameter of runner is 1.5meters then calculate diameter of jet is ___________
14. The expression for maximum hydraulic efficiency of Pelto turbine is given by ______________
15. Design of Pelton wheel means the following data is to be determined.
16. In Pelton turbine ___________ is defined as ratio between power delivered to runner and power supplied at inlet of turbine.
17. Among the following which turbine has least efficiency?
18. The hydraulic efficiency of Pelton turbine will be maximum when blade velocity is equal to _______
19. In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as _______
20. In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________
21. In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is _____________
22. The power supplied at inlet of turbine in S.I units is known as_____________
23. Number of buckets on runner of Pelton wheel is given by expression? (D-diameter of runner and d- diameter of jet)
24. The value of coefficient of velocity is _____________
25. The work done per unit weight of water jet striking runner blades of Pelton turbine is given by expression ______________