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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea

hot wire anemometer
Venturimeter
rotameter
pitot tube

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Hydraulics and Fluid Mechanics in ME
The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H
(N√Q)/H5/4
(N√Q)/H2/3
(N√Q)/H3/4

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.585 a.√(2gH)
1.855 aH.√(2g)
0.855 a.√(2gH)
5.85 aH.√(2g)

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Hydraulics and Fluid Mechanics in ME
Density of water is maximum at

0°C
4°C
100°C
0°K

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Hydraulics and Fluid Mechanics in ME
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on

a cylinder
a streamlined body
a circular disc of plate held normal to flow
a sphere

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Hydraulics and Fluid Mechanics in ME
Kinematic viscosity is dependent upon

Distance
Density
Pressure
Flow

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