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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a centrifugal pump, the liquid enters the pump

From sides
At the canter
At the bottom
At the top

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Hydraulics and Fluid Mechanics in ME
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.95 times
0.67 times
0.81 times
0.34 times

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Hydraulics and Fluid Mechanics in ME
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

tanθ = a/2g
tanθ = 2 a/g
tanθ = a/g
tanθ = a2/2g

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηm = ηm × ηh
None of these
ηh = ηo × ηm
ηo = ηh × ηm

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Hydraulics and Fluid Mechanics in ME
A structure used to dam up a stream or river over which the water flows is called

Weir
Dam
Notch
Orifice

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Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Steady flow
Highly turbulent flow
Laminar flow
Smooth and streamline flow

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