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Hydraulics and Fluid Mechanics in ME

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
Maximum
Minimum
Could be any value

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Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

e.g. of the body
metacentre
all points on the surface of the body
bottom surface of the body

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Hydraulics and Fluid Mechanics in ME
A fluid of kinematic viscosity 0.4 cm²/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be

1 m/sec
1.5 m/sec
less than 1 m/sec
2 m/sec

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Hydraulics and Fluid Mechanics in ME
The stress-strain relation of the newtoneon fluid is

linear
hyperbolic
inverse type
parabolic

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Hydraulics and Fluid Mechanics in ME
The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

Medium speed with radial flow at outlet
High speed with radial flow at outlet
Slow speed with radial flow at outlet
High speed with mixed flow at outlet

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Hydraulics and Fluid Mechanics in ME
A streamline is defined as the line

parallel to central axis flow
parallel to outer surface of pipe
along which the pressure drop is uniform
of equal yelocity in a flow

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