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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

Less than unity
Between 1 and 6
Unity
None of these

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Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q × hf
w × Q × H
w × Q (H - hf)
w × Q (H + hf)

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Hydraulics and Fluid Mechanics in ME
Metacentric height for small values of angle of heel is the distance between the

centre of gravity and centre of buoy-ancy
free surface and centre of buoyancy
centre of buoyancy and metacentre
centre of gravity and metacentre

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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 discharge of wheel is

0.25 m3/s
2.5 m3/s
0.5 m3/s
1.5 m3/s

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Hydraulics and Fluid Mechanics in ME
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

3flv²/2gd
flv²/2gd
flv²/gd
4flv²/2gd

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Hydraulics and Fluid Mechanics in ME
The top of the weir over which the water flows is known as

Orifice
None of these
Sill or crest
Nappe or vein

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