Virtual Labs

Which of the following advantages is/are possessed by a Kaplan turbine over a Francis turbine?
A. Low frictional losses.
B. Part load efficiency is considerably high.
C. More compact and smaller in size.
Select the correct answer using the codes given below.

a: Only A b: Only A and B c: Only B and C d: A, B and C

The diameter of the turbine runner varies as

a: Square of power for the given head b: Square of discharge for the given speed c: Square root of the speed for given head d: Square root of the head for given speed

The cavitation in reaction turbines is avoided, to a great extent by

a: Using stainless steel runner of the turbine b: Installing the turbine below the tail race level c: Providing highly polished blades to the runner d: All of the above

Specific speed of the hydraulic turbine is defined as the speed of such a turbine

a: It consumes unit discharge under unit speed b: It consumes unit discharge to develop one metric HP c: It develops one metric HP under unit head d: It runs at unit speed under unit head

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