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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit speed of the wheel is

80 r.p.m.
20 r.p.m.
10 r.p.m.
40 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be

2000 kg
500 kg
1500 kg
1000 kg

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Hydraulics and Fluid Mechanics in ME
A fluid in equilibrium can't sustain

Shear stress
Compressive stress
Tensile stress
Bending stress

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Hydraulics and Fluid Mechanics in ME
In centrifugal pumps, maximum efficiency is obtained when the blades are

Bent backward
Radial
Straight
Bent forward

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Hydraulics and Fluid Mechanics in ME
The divergent portion of a Venturimeter is made longer than convergent portion in order to

None of these
Avoid the tendency of breaking away the stream of liquid
To minimize frictional losses
Both (A) and (B)

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H3/2

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