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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Velocity of liquid
Length of mouthpiece
Pressure of liquid
Area of mouthpiece

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

6 kN/m3
10 kN/m3
4.5 kN/m3
7.5 kN/m3

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Hydraulics and Fluid Mechanics in ME
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will

Increase
Decrease
May increase or decrease depending on the characteristics of liquid
Remain unaffected

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth for a circular pipe of diameter (d) is

d/4
d/2
d/6
d

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Hydraulics and Fluid Mechanics in ME
The pressure measured with the help of a Piezometer tube is in

N/m2
Head of liquid
All of these
N/mm2

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

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