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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The variation in the volume of a liquid with the variation of pressure is called its

Viscosity
Compressibility
Capillarity
Surface tension

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

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

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Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - nH)H3
1.84(L - 0.1nH)H3/2
1.84(L - nH)H2
1.84(L - 0.1nH)H5/2

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Hydraulics and Fluid Mechanics in ME
In an isothermal atmosphere, the pressure

varies in the same way as the density
decreases linearly with elevation
increases exponentially with elevation
remains constant

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Hydraulics and Fluid Mechanics in ME
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is

L/2
L
L/3
L/4

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Hydraulics and Fluid Mechanics in ME
Which of the following has highest coefficient of discharge ?

sharp edged orifice
venturimeter
CipoUetti weir
Borda’s mouthpiece running full

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