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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

Directly
Inversely
Both A and B
None of these

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηm = ηm × ηh
ηo = ηh × ηm
None of these
ηh = ηo × ηm

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Hydraulics and Fluid Mechanics in ME
The variation in the volume of a liquid with the variation of pressure is called its

Capillarity
Surface tension
Viscosity
Compressibility

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

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

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

(μπ²N/60t) × (R₁² - R₂²)
(μπ²N/60t) × (R₁ - R₂)
μπ²N/60t) × (R₁³ - R₂³)
(μπ²N/60t) × (R₁⁴ - R₂⁴)

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Hydraulics and Fluid Mechanics in ME
Surge wave in a rectangular channel is an example ofi) steady flowii) unsteady flowiii) uniform flowiv) non-uniform flowThe correct answer is

(ii) and (iv)
(i) and (iii)
(ii) and (iii)
(i) and (iv)

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