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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.577 R
0.707 R
0.223 R
0.423 R

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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

10000
2700
21000
2100

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

low pressure
weak material
high pressure
high velocity

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Hydraulics and Fluid Mechanics in ME
The pressure of the liquid flowing through the divergent portion of a Venturimeter

Increases
Decreases
Remains constant
Depends upon mass of liquid

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Hydraulics and Fluid Mechanics in ME
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

Sum
Difference
Product
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 (H - hf)
w × Q × H
w × Q × hf
w × Q (H + hf)

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