For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

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Electrical Engineering XYZ MCQs

For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is:

  1. Pelton
  2. Kaplan
  3. Francis
  4. Impeller

Correct answer: 2. Kaplan

Explanation: Kaplan turbines are specifically designed for low variable water heads. They are reaction turbines, meaning they utilize both the kinetic energy and the pressure energy of the water. Kaplan turbines have adjustable blades (or vanes) which allow for efficient operation across a range of flow rates and heads. This makes them suitable for low head applications where the flow of water can vary.

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