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Fluid Mechanics

Fluid Mechanics
N²Re/NFr is called the __________ number.

Archimedes
Euler
Galileo
Brinkman

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Fluid Mechanics
Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.)

d1/3
√d
d4/5
d2/3

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Fluid Mechanics
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is

< 1
1
2
> 1

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Fluid Mechanics
The equivalent diameter for flow through a rectangular duct of width B and height H is

2HB/(H + B)
4HB/(H + B)
HB/2(H + B)
HB/(H + B)

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Fluid Mechanics
Unit of mass velocity is

Kg/m². hr
Kg/m²
Kg/hr
Kg/m³. hr

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Fluid Mechanics
For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

2
>2
43832

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MORE MCQ ON Fluid Mechanics

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