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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

Inversely proportional
Equal to
Directly proportional
None of these

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Hydraulics and Fluid Mechanics in ME
Kinematic viscosity is dependent upon

Pressure
Flow
Density
Distance

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Hydraulics and Fluid Mechanics in ME
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

w/h
h/w
h
wh

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Hydraulics and Fluid Mechanics in ME
For hypersonic flow, the Mach number is

unity
greater than 4
greater than 2
greater than unity

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Hydraulics and Fluid Mechanics in ME
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

2p/sinα
p/2sinα
p/sinα
2p/sin (α/2)

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

slightly more
equal
slightly less
nearly half

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