Low specific speed of a pump implies it is____________________? A. centrifugal pump B. mixed flow pump C. axial flow pump D. any one of the above E. none of the above

In a centrifugal pump, the liquid enters the pump__________________? A. at the top B. at the bottomC. at the center D. from sides E. none of the above

In centrifugal pumps, maximum efficiency is obtained when the blades are_________________? A. straight B. bent forwardC. bent backward D. radial E. given aerofoil section

The optimum value of vane exit angle for a centrifugal pump impeller is_________________? A. 10-15°B. 20-25° C. 30-40° D. 50-60° E. 80-90°.

If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of…

When a pig system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________? A. horizontalB. nearly horizontal C. steep D. first rise and then fall E. none of the above

The efficiency of a centrifugal pump is maximum when its blades are__________________? A. straight B. bent forwardC. bent backward D. bent forward first and then backward E. bent backward first and then forward

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________? A. high initial and maintenance cost B. lower discharge C. lower speed of operation D. necessity of air vessel E. all of…

In a centrifugal pump casing, the flow of water leaving the_______________? A. radial B. radial C. centrifugal D. rectilinearE. vortex

Head developed by a centrifugal pump depends on___________________? A. impeller diameter B. speed C. fluid density D. type of casingE. A. and B. above