An impulse turbine is running at 1000 rpm with a net head 600 m. If the discharge through the nozzle is 0.1 m3/s, then what will be the power available at the nozzle? Take g = 10 m/s2

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SSC JE Mechanical 9 Oct 2023 Shift 2 Official Paper-I
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  1. 450 kW
  2. 600 kW
  3. 525 kW
  4. 700 kW

Answer (Detailed Solution Below)

Option 2 : 600 kW
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Detailed Solution

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Concept: 
Power (in kW) available at the nozzle of Pelton wheel turbine is calculated by

\(P= \dfrac{{ρ gQH}}{{1000}}\)

where ρ = Density of water, Q = Discharge through nozzle, H = Net Head on the Pelton wheel

Calculation:

Given:

Discharge through nozzle Q = 0.1 m3/s , net Head on the Pelton wheel H = 600 m, density of water ρ = 1000 kg/m3

\(P = \dfrac{{ρ gQH}}{{1000}} =\dfrac{1000\times10\times 0.1\times600}{1000}= 600\;kW\)

∴ The power available at the nozzle is 600 kW.

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