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Hydraulic Machines Practice Test: Kaplan Turbine
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Kaplan Turbine topics include: Kaplan turbine velocity diagrams, kaplan turbine work and efficiency. The Kaplan turbine is a propeller-type water turbine that generates electricity from flowing water. It was developed in 1913 by Austrian professor Viktor Kaplan.  Kaplan turbines are used for power generation and are generally efficient over a range of flow rates. They are used for low head and high flow conditions and are suitable for low-pressure hydropower projects.  Here are some characteristics of Kaplan turbines: Axial-flow turbines: The direction of flow does not vary while crossing... Show more
Hydraulic Machines Practice Test: Kaplan Turbine
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25 Questions

1. Kaplan turbine is most commonly used in propeller turbines.
2. The power output of Kaplan turbine ranges from__________
3. In the outlet velocity triangle of a Kaplan turbine, β2 = 30o. Vf2 = 5 m/s. What is the relative velocity of the flow at outlet?
4. The velocity of the flow through the Kaplan turbine is 25 m/s. The available head of the turbine is 60 m. Find the flow ratio of the turbine (take g = 10 m/s2).
5. The whirl velocity of water at the inlet of the Kaplan turbine is 15 m/s. The velocity of water at inlet of the turbine is 20 m/s. Find the guide vane angle at inlet (In degrees).
6. The velocity of the flow at the inlet of Kaplan turbine is V. In an experimental setup, what could be the possible value of the velocity of the flow at the outlet of Kaplan turbine?
7. The volume flow rate into a Kaplan turbine is Q m3/s. 0.10Q m3/s volume of water do not flow over the runner blades. What further information is required to find the volumetric efficiency (numerical value) of the Kaplan turbine?
8. The whirl velocity at inlet of a Kaplan turbine is 7.5 m/s and blade velocity is 5 m/s. The volume flow rate of water in 20 m3/s. Find the power output available at the shaft if the mechanical efficiency is 93% (in MW)?
9. What type of turbine is Kaplan?
10. The Kaplan Turbine is an evolution of ________
11. Which of the following efficiencies for Kaplan Turbine is described as the ratio between the power produced by runner to the power supplied by water at the inlet?
12. The hydraulic efficiency of a Kaplan turbine is 95%, the mechanical efficiency is 93% and the volumetric efficiency is assumed to be 100%. Fine the overall efficiency (in %)?
13. Kaplan turbine is an ________ type turbine
14. The desired hydraulic efficiency of a Kaplan turbine is 98% at a whirl velocity of 20 m/s and a head of 60 m. What should be the blade velocity of the turbine at inlet in m/s? Take g = 10 m/s2.
15. It is given that the input water power of the Kaplan turbine is 1.10 times the runner power. What would be the hydraulic efficiency of the turbine (in %)?
16. In a Kaplan turbine, what is the direction of water flow?
17. Kaplan turbine is an ______ reaction turbine
18. The velocity of flow through a Kaplan turbine is 10 m/s. The outer diameter of the runner is 4 m and the hub diameter is 2 m. Find the volume flow rate of the turbine in m3/s?
19. The outlet of the Kaplan turbine is through _______
20. In a Kaplan turbine experiment, the volumetric efficiency of a given turbine is 91%. If volume flow rate of water in given to be 35 m3/s, find the volume of water (m3) NOT flowing over the runner blades per second?
21. Which of the following efficiencies for Kaplan Turbine is defined as the ratio between the power available at the shaft of the turbine to the power produced by the runner?
22. A Kaplan turbine requires a speed ratio of 2. The available head of the turbine is 5 m. What should be the blade velocity of the turbine such that a speed ratio of 2 is maintained (take g = 10 m/s2)?
23. Nozzles in the Kaplan turbine move due to impact of ________
24. The relative velocity of water at the inlet of the Kaplan turbine is 7 m/s. β1 = 75o. The whirl velocity of the water at inlet is 10 m/s. Find the blade velocity of the turbine?
25. What is the dimension of thermal efficiency of a Kaplan turbine?