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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N/m
N/m3
N/m2
N-m

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Hydraulics and Fluid Mechanics in ME
The liquid used in manometers should have

Low surface tension
High surface tension
Low density
High density

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Hydraulics and Fluid Mechanics in ME
A pressure of 25 m of head of water is equal to

2.5 kN/m2
2500 kN/m2
25 kN/m2
245 kN/m2

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

C × √(m × i)
AC × √(m × i)
mi × √(A × C)
A × √(m × i)

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Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine with increase in unit speed

Decreases
First increases and then decreases
Increases
Remain unaffected

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

equal
slightly less
slightly more
nearly half

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