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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc × Cr
Cc/Cr
Cv × Cr
Cc × Cv

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Hydraulics and Fluid Mechanics in ME
An impulse turbine is used for

High discharge
Medium head of water
Low head of water
High head of water

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Hydraulics and Fluid Mechanics in ME
Resultant pressure of the liquid in the case of an immersed body acts through

Centre of gravity
Centre of buoyancy
Metacentre
Centre of pressure

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2AH₁²)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2A√H₁)/(Cd × a√2g)
(2AH₁)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
Which of the following is an example of laminar flow?

Flow past tiny bodies
All of these
Underground flow
Flow of oil in measuring instruments

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