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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

Horizontal
Steep
First rise and then fall
Nearly horizontal

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Hydraulics and Fluid Mechanics in ME
A thick liquid like syrup has a ___ viscosity than a light liquid like water.

Lesser
Greater
None of the listed here
Same

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Hydraulics and Fluid Mechanics in ME
The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

Q = (Cd × a)/√(2gh)
Q = (3Cd × a)/√(2h)
Q = (2/3). Cd × a × h
Q = Cd × a × 2gh

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Hydraulics and Fluid Mechanics in ME
Euler’s dimensionless number relates the following

pressure force and inertial force
viscous force and inertial force
viscous force and buoyancy force
inertial force and gravity

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Hydraulics and Fluid Mechanics in ME
Mercury does not wet glass. This is due to property of liquid known as

adhesion
viscosity
cohesion
surface tension

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Hydraulics and Fluid Mechanics in ME
The highest efficiency is obtained with a channel of __________ section.

Rectangular
Trapezoidal
Square
Circular

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