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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
Broad-crested weir
Ogee weir
Narrow-crested weir

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Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

0.15 to 0.3
0.4 to 0.5
1 to 1.5
0.6 to 0.9

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Hydraulics and Fluid Mechanics in ME
The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is

48.2 r.p.m
24.8 r.p.m.
248 r.p.m
82.4 r.p.m.

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

uniform flow
turbulent flow
one dimensional flow
steady flow

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

wH/2
wH2/2
wH2/3
wH

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

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

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