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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

Nozzle
Weir
Notch
Mouthpiece

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)
14π R5/2/15Cd × a √(2g)

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Hydraulics and Fluid Mechanics in ME
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.81 times
0.34 times
0.67 times
0.95 times

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Hydraulics and Fluid Mechanics in ME
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

2700
2100
21000
10000

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Hydraulics and Fluid Mechanics in ME
Which of the following is not a reaction turbine?

Pelton wheel
Journal turbine
Thomson's turbine
Fourneyron turbine

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.75 to 0.85
0.65 to 0.75
0.85 to 0.90
0.50 to 0.65

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