SSC JE Mechanical Engineering 27 Sep 2019 Shift 1 Paper

Question : 115 of 200

Marks: +1, -0

The change in head across a small turbine is 10 m, the flow rate of water is 1

m^3\/s

and the efficiency are 80%. The power developed by the turbine is approximately:

Solution:

Given:

\η_{0}=0.8

, Head

{h}=10 {m}

, and

{Q}=1 {m}^{3} \/ {s}

\η_{0}={\text "S.P "}/{W . P}={S . P}/{\ρ\×Q \×g \×h}

0.8={S . P}/{1000 \×1 \×9.81 \×10} \

⇒S . P=78480 { W} \≈ 78 {kW}

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