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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

Equal to
Double
One-half
Three fourth

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2/2
ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/4

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

All of these
They are suitable even for low water heads
They have slow speeds
They give constant efficiency, even if the discharge is not constant

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Kept fully open
Kept 50% open
Kept fully closed
Irrespective of any position

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Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A × M × m2/3 × i1/2
A1/2 × M2/3 × m × i
A2/3 × M1/3 × m × i
A × M × m1/2 × i2/3

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

Impulse turbine
Propeller turbine
None of the listed here
Francis turbine

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