Which of the following is correct? If the number of jets in a Pelton turbine is n then the specific speed is proportional to
- An 2
- Bn
- Cn ½Correct
- Dn 0
Solution
Concept
Effect of jets
Formula
Ns ∝ √n
Step-by-step solution
1. For n jets, power increases n times; Ns = N√P/H5/4 ∝ √n.
Explanation
Specific speed varies as the square root of the number of jets.
Why the other options are wrong
Other powers are not correct.
Shortcut
Ns ∝ √n.
Correct answer: C) n ½