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Fluid Mechanics

Fluid Mechanics
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?

2
1.5
0.5
1

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Fluid Mechanics
Schedule number of a pipe, which is a measure of its wall thickness, is given by

100 P'/S
10000 P'/S
1000 P'/S
1000 S/P'

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Fluid Mechanics
Toothpaste is a

Pseudoplastic
Dilatent
Newtonion liquid
Bingham plastic

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Fluid Mechanics
With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss

Increases linearly
Decreases
Remains constant
Increases

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Fluid Mechanics
Cp/Cv is termed as

Prandtl number
Weber number
Mach number
Adiabatic constant

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Fluid Mechanics
If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).

V₁ = V₂ = V₃
Q₁ = Q₂ = Q₃
Q = Q₁ + Q₂ + Q₃
F = f₁ + f₂ + f₃

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