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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

wH2/2
wH2/4
wH
wH/2

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Hydraulics and Fluid Mechanics in ME
Which of the following is used to measure the discharge ?

pitot tube
venturimeter
hotwire anemometer
current meter

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Hydraulics and Fluid Mechanics in ME
In reaction turbine, draft tube is used

To transport water downstream without eddies
To increase flow rate
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
For safety of turbine

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Hydraulics and Fluid Mechanics in ME
The most efficient section of a channel is

Triangular
Square
Rectangular
Trapezoidal

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Hydraulics and Fluid Mechanics in ME
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

0.8
1.2
0.75
1

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)
14π R5/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)

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