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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

viscosity
surface tension forces
atmospheric pressure
air resistance

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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
Directly proportional
Equal to
None of these

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Hydraulics and Fluid Mechanics in ME
The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump 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 axial flow at outlet

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Hydraulics and Fluid Mechanics in ME
Medium specific speed of turbine implies it is

Propeller turbine
Any one of the above
Francis turbine
Impulse turbine

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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/sin (α/2)
p/sinα
2p/sinα
p/2sinα

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Hydraulics and Fluid Mechanics in ME
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

Decreases
None of these
Remain same
Increases

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