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Fluid Mechanics

Fluid Mechanics
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)

1/d
D
Σ
L/σ

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Fluid Mechanics
In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)

1.5 Vavg
1.8 Vavg
1.2 Vavg
Vavg

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

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

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Fluid Mechanics
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.

P, Q and R
R and S
P and R
P, Rand S

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Fluid Mechanics
The dimension of kinematic viscosity is

None of these
L²T⁻¹
ML⁻²T⁻¹
ML⁻²T⁻²

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Fluid Mechanics
The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

1.8
12.4
736.4
186.2

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