When two centrifugal pumps are operated in series, the discharge

This question was previously asked in
UKPSC JE Civil 2013 Official Paper II
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  1. Increases
  2. Decreases
  3. Remains constant
  4. Initially increases, then decreases 

Answer (Detailed Solution Below)

Option 3 : Remains constant
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Detailed Solution

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Concept:

Centrifugal Pump:

Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor.

Operation of two Identical Pumps in Series:​
  • The pressure in the rising main increases, it becomes almost double and the discharge remains constant.
  • Head is also increased at a constant flow rate.

F1 Tabrez Anil 04.03.21 D3

Important Points

Pumps in parallel:

F1 Tabrez Anil 04.03.21 D4

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