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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit speed of the wheel is

40 r.p.m.
10 r.p.m.
20 r.p.m.
80 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The centre of pressure acts __________ the centre of gravity of immersed surface.

Above
None of these
Below
At

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Hydraulics and Fluid Mechanics in ME
In a venturi-flume, the flow takes place at

Gauge pressure
Absolute pressure
Atmospheric pressure
None of these

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

Both (A) and (B)
To minimize frictional losses
Avoid the tendency of breaking away the stream of liquid
None of these

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Hydraulics and Fluid Mechanics in ME
The upper surface of a weir over which water flows is known is

nappe
crest
weir top
sill

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Hydraulics and Fluid Mechanics in ME
The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H5/4
(N√Q)/H3/4
(N√Q)/H
(N√Q)/H2/3

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