The specific speed of a pump is defined as the speed at which a geometrically similar pump would operate to deliver:

Question

Given below are two statements:
Statement (I): Check basin method is suitable for irrigated crops which are sensitive to wet soil conditions around the stems of plants.
Statement (II): Check basin irrigation is the most common method of irrigation in India and in many other countries.

In light of the above statements, choose the most appropriate answer from the options given below.

Answer 1

Key Concept: Specific speed (Ns) is a defined reference value used to compare pumps of different sizes.

Why it's correct: By definition, Ns is the speed at which a geometrically similar pump delivers unit discharge (1 m³/s) at unit head (1 m) — matching 'unit discharge at unit head' exactly.

Why others fail: Maximum efficiency, zero discharge at max head, and infinite discharge at zero head all describe points on a pump's performance curve, not the definition of specific speed itself.

The specific speed of a pump is defined as the speed at which a geometrically similar pump would operate to deliver:

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The Correct Option is A

Solution and Explanation

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