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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

equal
more
less
less at low temperature and more at high temperature

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Hydraulics and Fluid Mechanics in ME
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Trimming the impeller size to the required size by machining
Designing new impeller
Some other alterations in the impeller
Not possible

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

0.67 times
0.34 times
0.81 times
0.95 times

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Hydraulics and Fluid Mechanics in ME
The value of mass density in kg-sec-V-m⁴ for water at 0°C is

101.9
1000
100.9
1

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Hydraulics and Fluid Mechanics in ME
The shear stress-strain graph for a Newtonian fluid is a

Parabolic curve
Elliptical
Straight line
Hyperbolic curve

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Hydraulics and Fluid Mechanics in ME
Barometer is used to measure

Very low pressure
Atmospheric pressure
Difference of pressure between two points
Pressure in pipes, channels etc.

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