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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

Notch
Mouthpiece
Nozzle
Weir

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

275.4 r.p.m
215.5 r.p.m.
241.5 r.p.m.
175.4 r.p.m.

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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

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

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Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

All of these
Causes noise and vibration of various parts
Reduces the discharge of a turbine
Causes sudden drop in power output and efficiency

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Hydraulics and Fluid Mechanics in ME
The maximum discharge over a broad crested weir is

0.384 Cd × L × H1/2
1.71 Cd × L × H1/2
0.384 Cd × L × H3/2
1.71 Cd × L × H3/2

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Hydraulics and Fluid Mechanics in ME
The value of bulk modulus of a fluid is required to determine

Froude's number
Euler's number
Reynold's number
Mach number

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