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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

Depend upon the characteristics of liquid
Decrease
Increase
Remain unchanged

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

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

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

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Hydraulics and Fluid Mechanics in ME
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on

a cylinder
a sphere
a streamlined body
a circular disc of plate held normal to flow

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Hydraulics and Fluid Mechanics in ME
An error of 1% in measuring head over the apex of the notch (H) will produce an error of _________ in discharge over a triangular notch.

0.025
0.015
0.01
0.02

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Hydraulics and Fluid Mechanics in ME
A turbine pump is basically a centrifugal pump equipped additionally with

Adjustable blades
Vaned diffusion casing
Backward curved blades
Inlet guide blades

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