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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

(8/15) Cd. 2g. H3/2
(8/15) Cd. 2g. H²
(8/15) Cd. 2g. H5/2
(8/15) Cd. 2g. H

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Kept fully closed
Kept fully open
Irrespective of any position
Kept 50% open

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Hydraulics and Fluid Mechanics in ME
Low specific speed of a pump implies it is

None of these
Axial flow pump
Mixed flow pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

(w Hm Q) / ηo
(w Q) / (Hm × ηo)
(w Q ηo) / Hm
(w Hm) / (Q × ηo)

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is

0.36
0.46
0.26
0.56

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Hydraulics and Fluid Mechanics in ME
Center of pressure on an inclined plane is

Below the Centroid
Above the Centroid
At metacentre
At the Centroid

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