In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?
Correct answer: B. Water flow in the suction and discharge pipe of a reciprocating pump
- A. Discharge of water by a centrifugal pump being run at a constant rpm
- B. Water flow in the suction and discharge pipe of a reciprocating pump
- C. Water discharge from a vertical vessel in which constant level is maintained
- D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe
Explanation
A reciprocating pump produces pulsating suction and discharge, so the velocity and flow rate at a fixed position vary with time. A centrifugal pump at constant speed and a vessel held at constant level give essentially steady flow.
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