Hydropower Engineering MCQ with answer and solution

Concept

Function of a surge tank

Step-by-step solution

1. Sudden load rejection or acceptance causes the penstock flow to change quickly, producing water hammer. 2. A surge tank near the turbine absorbs these pressure fluctuations by letting the water level rise and fall in it.

Explanation

The surge tank protects the penstock and turbine from rapid pressure fluctuations by providing a free water surface close to the power house. It also supplies water during sudden load increases.

Shortcut

Surge tank = water hammer protection.

Common mistake

Choosing "store additional water".