Two hydraulic turbines are similar and homologous, when they are geometrically similar and have
- Athe same Thoma number
- Bthe same Froude number
- Cthe same specific speedCorrect
- Dthe same rotational speed
Solution
Concept
Homologous turbines
Step-by-step solution
1. Geometrically similar turbines with the same specific speed are homologous.
Explanation
Same Ns indicates dynamic similarity.
Why the other options are wrong
Thoma and Froude numbers do not define homology.
Shortcut
Same Ns.
Correct answer: C) the same specific speed