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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

Equal to
None of these
More than
Less than

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as square root of density
Directly as the air or gas density
Inversely as density
As square of density

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Hydraulics and Fluid Mechanics in ME
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

Both A and B
Does not effect
None of these
Effects

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 - cos φ)/2
(1 - sin φ)/2
(1 + cos φ)/2
(1 + sin φ)/2

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as

One dimensional flow
Steady flow
Turbulent flow
Uniform flow

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Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Specific speed
Unit speed
None of these
Normal speed

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