Q. Consider the following statements.

i. Runoff river plants can be located on any river
ii. Runaway speed of a turbine is generally 180% of normal speed
iii. Underground power stations are suited to areas susceptible to landslides
iv. Higher the specific speed, higher will be the discharge and the head

Which of these statements are correct?

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Q. Pick the correct choice of turbine required to generate 10,000 HP under a head of 81 m while working at a speed of 500 rpm.

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Q. A draft tube is essentially required for impulse type turbines.

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Q. If the specific speed in revolution per minute of a turbine is in between 60 to 300, the type of the turbine is ________________

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Q. If two identical pumps each capable to deliver a discharge Q against a head H are connected ___________________________

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Q. For a hydropower plant working on 150 m head, the water is sandy and the load on the plant is highly variable. Which type of turbine will generally be recommended?

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Q. For a hydropower plant having 150 m head of stored water behind the dam. The water in the reservoir is clear and load on the powerhouse is not likely to fluctuate much. Which type of turbine will be suitable for the same?

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Q. In a Francis turbine, the water flows through a closed draft tube.

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Q. In a reaction turbine like a Francis turbine or a Kaplan turbine ______________

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Q. An impulse turbine like a Pelton’s turbine is __________________________

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Q. Kaplan turbines are found to be more versatile and costly in their initial cost as compared to propeller turbines.

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Q. An impulse turbine is essentially a __________________

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Q. Which of the following is turbine is used for medium heads ranging from 25 to 150 meters?

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Q. Which of the following is an example of an impulse turbine?

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Q. What is the highest elevation of water level that can be maintained in the reservoir without any spillway discharge either with gated or non-gated spillway?

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Q. 400 cumecs of water are being released from dam storage to meet the downstream demand through the turbines of the connected hydro plant. The effective head of water acting on the turbines is 50 m. The efficiency of the hydro plant is 0.8. The electrical power generated from this plant is __________________

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Q. If the peak load on a power plant having a capacity of 100 MW is 70 MW during a given week. Calculate the utilization factor.

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Q. Calculate utilisation factor if the maximum power utilised is 40,000 kW and two turbo generators installed each of capacity 23,000 kW.

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Q. The load on a hydel plant varies from a minimum of 10,000 kW to a maximum of 35,000 kW. Two turbo-generators of capacities 20,000 kW each have been installed. Calculate Plant factor.

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Q. The difference of head at the point of entry and exit of turbine is _______________

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