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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

work
length
energy
mass

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

1.5 Q
Same quantity of liquid
Q/0.75
0.75 Q

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Hydraulics and Fluid Mechanics in ME
Braking jet in an impulse turbine is used

To break the jet of water
To bring the runner to rest in a short time
To change the direction of runner
None of these

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Hydraulics and Fluid Mechanics in ME
Gradually varied flow is

non-steady uniform
steady non-uniform
non-steady non-uniform
steady uniform

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Hydraulics and Fluid Mechanics in ME
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

20 mm
10 mm
30 mm
5 mm

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Hydraulics and Fluid Mechanics in ME
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

Compressibility of liquid
Surface tension of liquid
Density of liquid
Specific gravity of liquid

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