In a centrifugal pump, the impeller primarily increases the water's:
Correct answer: D. Velocity and angular momentum
- A. Surface tension and capillary rise
- B. Viscosity and vapour pressure
- C. Density and atmospheric pressure
- D. Velocity and angular momentum
Explanation
The rotating impeller imparts velocity and angular momentum to the water. The casing or diffuser then helps convert part of this velocity head into pressure head.
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About Hydraulics and Water Resources
Hydraulics studies fluid properties, pressure, buoyancy, continuity, Bernoulli's equation, momentum, pipe flow, open-channel flow and hydraulic machines. Water resources extends these principles to pumps, turbines, reservoirs, irrigation, floods and hydrology, while distinguishing laminar from turbulent flow and uniform from gradually varied channel flow.
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