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Fluid Mechanics

Fluid Mechanics
The ratio of inertial forces to viscous forces is called the __________ number.

Mach
Weber
Reynold
Froude

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Fluid Mechanics
A centrifugal pump is called a turbine pump, if it is having a

Rotating vaned volute
Vaned diffusion casing
None of these
Turbine type impeller

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Fluid Mechanics
A hydraulic ram acts as a/an __________ pump.

Centrifugal
Impulse
Reciprocating
Parallel cylinder

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Fluid Mechanics
As per Newton's law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to(where, μ = fluid viscosity)

μ
1/μ²
1/μ
μ²

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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
< 1
2

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Fluid Mechanics
A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is

< Δp
Δp
> Δp
Δp²

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