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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the boilers?

Centrifugal pump
Airlift pump
Reciprocating pump
Jet pump

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Hydraulics and Fluid Mechanics in ME
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

(8/15) Cd. 2g. H
(8/15) Cd. 2g. H5/2
(8/15) Cd. 2g. H3/2
(8/15) Cd. 2g. H²

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth for a circular pipe of diameter (d) is

d/6
d/4
d
d/2

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Hydraulics and Fluid Mechanics in ME
In an isothermal atmosphere, the pressure

decreases linearly with elevation
varies in the same way as the density
increases exponentially with elevation
remains constant

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Hydraulics and Fluid Mechanics in ME
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

0.5
0.8
0.4
0.6

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure above the nappe is atmospheric
The pressure below the nappe is negative
The pressure below the nappe is atmospheric
The pressure above the nappe is negative

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