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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Specific weight of water in S.I. units is equal to

1000 N/m3
9.81 xlO6 N/m3
9.81 xlO3 N/m3
10000 N/m3

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Hydraulics and Fluid Mechanics in ME
An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

9.81 m/sec²
9.75 m/sec²
10 m/sec²
9 m/sec

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Hydraulics and Fluid Mechanics in ME
The speed ratio in case of Francis turbine varies from

1 to 1.5
0.4 to 0.5
0.15 to 0.3
0.6 to 0.9

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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)/H2/3
(N√Q)/H3/4
(N√Q)/H

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Same as
Lower than
Higher than
None of these

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wAx
wA
wA/x
wx

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