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

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Q. An impulse turbine is essentially a __________________

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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 like a Pelton’s turbine is __________________________

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

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

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

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

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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. 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. The Pumps in series operation allow the head to increase and the pumps in parallel operation increase the flow rate.

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Q. Forebay provides temporary storage before the water goes to the turbine. Following perform the function of forebay ____________________

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Q. The surge tank serves which of the following purposes?

i. It allows the sediment to settle down
ii. It prevents debris from entering powerhouse
iii. It controls pressure variations in pipelines
iv. It regulates flow in the pipelines

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Q. Identify the correct statement in regard to hydropower.

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Q. To avoid the possible damage to the wicket gates and turbine runners _________________ is provided.

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Q. In case of long penstocks, ___________________ is generally provided so as to absorb water hammer pressure.

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Q. Sharp bends must be avoided in penstocks while designing components of the hydroelectric scheme.

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