This question was asked inSupervisor Instructor Electrical Part B Technical Paper 2026Question 119 of 120 published · Gujarat Subordinate Service Selection BoardOpen paper
Q119EasyPower Generation

Which turbine is most suitable for a hydro-power plant with low head and a large water flow?

Answer & step-by-step solution
Correct answer: A. Kaplan turbine
Quick explanation

A — Kaplan turbine. It is an axial-flow reaction turbine with adjustable blades, ideal for low-head, high-discharge sites.

Detailed solution (in the paper’s original language)

સમજૂતી

Kaplan turbine axial-flow reaction turbine છે અને low-head, high-discharge hydroelectric sites માટે ખાસ અનુકૂળ છે.

તેના adjustable runner blades અને guide vanes વિવિધ flow conditions માં સારી efficiency જાળવવામાં મદદ કરે છે.

મુખ્ય ખ્યાલ

Low head + high flow → Kaplan turbine.

પરીક્ષા મુદ્દો

Turbine selection માટે head અને discharge મુખ્ય clue છે.

ઝડપી ટ્રિક

Pelton → high head/low flow; Kaplan → low head/high flow.

બીજા વિકલ્પો ખોટા કેમ છે

Pelton high-head impulse turbine છે; Francis સામાન્ય રીતે medium-head applications માટે છે.

સામાન્ય ભૂલ

Pelton જાણીતી turbine છે એટલા માટે તેને પસંદ કરી દેવું.

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