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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)

0.223 R
0.577 R
0.423 R
0.707 R

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Zero
Could be any value
Maximum
Minimum

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is preferred for flood control and irrigation applications?

Centrifugal pump
Axial flow pump
Reciprocating pump
Mixed flow pump

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Hydraulics and Fluid Mechanics in ME
An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

None of these
Partially
Free
Full

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

dQ/Q = 3/2 × (dH/H)
dQ/Q = 5/2 × (dH/H)
dQ/Q = 2 × (dH/H)
dQ/Q = 3 × (dH/H)

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Hydraulics and Fluid Mechanics in ME
The units of dynamic or absolute viscosity are

metres² per sec
kg sec/meter
newton-sec² per meter
newton-sec per meter

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