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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Submerged weir
Narrow-crested weir
Ogee weir
Broad-crested weir

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is preferred for flood control and irrigation applications?

Axial flow pump
Mixed flow pump
Centrifugal pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
In order to avoid cavitation in centrifugal pumps

The delivery pressure should be high
The suction pressure should be low
The suction pressure should be high
The delivery pressure should be low

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

greater than 4
unity
greater than unity
greater than 2

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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 + sin φ)/2
(1 + cos φ)/2

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Hydraulics and Fluid Mechanics in ME
Which of the following velocity potentials satisfies continuity equation ?

x2 + y2
x2y
x2-y2
cosx

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