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Hydraulics and Fluid Mechanics in ME

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

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Hydraulics and Fluid Mechanics in ME
A Francis turbine is used when the available head of water is

Above 250 m
0 to 25 m
None of these
25 m to 250 m

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Hydraulics and Fluid Mechanics in ME
Which of the following velocity potentials satisfies continuity equation ?

x2-y2
x2y
x2 + y2
cosx

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
ρ ω2 r2/2
2ρ ω2 r2
ρ ω2 r2/4

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Hydraulics and Fluid Mechanics in ME
Euler's number is the ratio of __________ force to pressure force.

None of these
Viscous
Gravity
Inertia

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Hydraulics and Fluid Mechanics in ME
The body will float if the force of buoyancy is ___ the weight of the liquid displaced.

Less than
More than
Equal to
None of the listed here

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