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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH
1.84 LH3/2
1.84 LH5/2
1.84 LH1/2

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Hydraulics and Fluid Mechanics in ME
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

None of these
16/Re
64/ Re
32/ Re

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z + p/w + v²/2g = constant
Z + p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z - p/w - v²/2g = constant

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

0.848
0.884
0.392
0.488

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

μπ²N/60t) × (R₁³ - R₂³)
(μπ²N/60t) × (R₁⁴ - R₂⁴)
(μπ²N/60t) × (R₁ - R₂)
(μπ²N/60t) × (R₁² - R₂²)

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Hydraulics and Fluid Mechanics in ME
If the surface of liquid is convex, men

There is no cohesion pressure
Cohesion pressure is negligible
Cohesion pressure is decreased
Cohesion pressure is increased

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