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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Puck up the wrong statement about centrifugal pump

Head a speed²
Head a diameter
Power a speed⁴
Discharge a diameter

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

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Hydraulics and Fluid Mechanics in ME
Reynold's number is the ratio of inertia force to

Viscous force
Gravity force
Pressure force
Elastic force

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

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

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Hydraulics and Fluid Mechanics in ME
The centre of pressure acts __________ the centre of gravity of immersed surface.

None of these
At
Above
Below

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Hydraulics and Fluid Mechanics in ME
The viscosity of a gas

increases with increase in temperature
decreases with increase in temperature
is independent of temperature
is independent of pressure for very high pressure intensities

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