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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For 450 m head of water, _________ shall be used.

None of these
Pelton wheel
Kaplan turbine
Francis turbine

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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
Pressure intensifier increases the pressure in proportion to

Square of inverse ratio of diameters
Ratio of diameters
Inverse ratio of diameters
Square of ratio of diameters

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Hydraulics and Fluid Mechanics in ME
Indicator diagram of a reciprocating pump is a graph between

Flow vs. speed
Flow vs. swept volume
Pressure in cylinder vs. swept volume
Pressure vs. speed

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2AH₁)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)
(2A√H₁)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

zero
equal to the vapour pressure over the plane surface
greater than the vapour pressure over the plane surface
less man the vapour pressure over the plane surface

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