Unit power is the power developed by a turbine when _______.

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SSC JE ME Previous Paper 15 ( Held on: 3 March 2017 Morning)
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  1. Head on turbine is unity and discharge is also unity
  2. Head = one metre and speed is unity
  3. Head on turbine is unity
  4. None of these 

Answer (Detailed Solution Below)

Option 3 : Head on turbine is unity
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The power developed by a turbine, working under a unit head is known as the unit power of the turbine.

P = ρgQH ∝ QH

Q = AV ⇒ Q ∝ √H

P ∝ H√H ∝ H3/2

P = K2 H3/2

When H = 1; P = Pu

Pu = K2

P = Pu H3/2

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