Which of these statements are correct?

1.A small hydro project gets a continuous, steady, uniform, regulated supply


of V m3/hour on all the 7 days of a week from a reservoir to its forebay.

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The hydro plant works 5 days a week for 8 hours per day. The pondage

required at the forebay is

(a) 96 V m3 (b) 56 V m3 (c) 48 V m3 (d) 64 V m

2. Consider the following statements:

A surge tank provided on the penstock connected to a water turbine

(1) helps reduce the water-hammer effect in a section of the penstock

(2) stores extra water when needed

(3) provides increased demand of water when needed

Which of these statements are correct?

(a) 1, 2 and 3 (b) 2 and 3 (c) 1 and 2 (d) 1 and 3

3. The function of a surge tank is to

(a) avoid reversal of flow

(b) reduce the water-hammer effect in a major section of the pipeline

(c) prevent occurrence of mass oscillation of water

(d) smoothen the flow

4. A surge tank is provided in a hydropower plant to

(a) to strengthen the penstocks

(b) reduce length of pipe affected by water-hammer pressure

(c) reduce frictional losses in the penstocks

(d) increase the net head

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