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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a siphon spillway is

Cd × a × √(2g) × H3/2
Cd × a × √(2g) × H2
Cd × a × √(2g) × H5/2
Cd × a × √(2gH)

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Hydraulics and Fluid Mechanics in ME
The power developed by a turbine is (where H = Head of water under which the turbine is working)

Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
Directly proportional to H1/2

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

Square root of velocity
Inversely proportional
Directly proportional
None of these

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Hydraulics and Fluid Mechanics in ME
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

16μvl/wd²
32μvl/wd²
4μvl/wd²
8μvl/wd²

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Hydraulics and Fluid Mechanics in ME
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is

15 kN
20 kN
5kN
lOkN

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Hydraulics and Fluid Mechanics in ME
The maximum thickness of boundary layer in a pipe of radius r is

2r
r/2
r

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