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Impulse turbine energy exchange: Jet velocity at entry and exit Evaluate the statement: In an impulse turbine, water 'impinges with a low velocity and leaves with a high velocity' after flowing over the buckets. Choose the correct judgment.

Difficulty: Easy

Correct Answer: False — entry velocity is high; exit velocity is reduced after energy transfer

Explanation:

Concept/Approach

  • Impulse turbines (e.g., Pelton) convert the entire available head into jet kinetic energy before the runner.


Reasoning
Thus, the jet strikes the buckets at high velocity and ideally leaves with a much lower absolute velocity after transferring energy to the runner.


Final Answer
False — the jet arrives fast and leaves slower.

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