FLUID MECHANICS QUIZ

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)

1/μ²

1/μ

μ

μ²

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Plunger pumps are used for

Slurries

Higher pressure

None of these

Viscous mass

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Multistage compressors are used in industry, because they

Resemble closely to isothermal compression

Reduce the cost of compressor

Are easy to control

Reduce the size requirement

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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 and R

P, Rand S

R and S

P, Q and R

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The capacity of an accumulator is the maximum

None of these

Energy which it can store

Liquid which it can store

Discharge which it can deliver

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Turbine impeller

Produces only tangential current

Is effective over wide range of viscosities

Produces only radial current

Does not produce tangential current

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Transition from laminar flow to turbulent flow is aided by the

Vibration

All of these

Surface roughness and curvature (i.e.sharp corners)

Pressure gradient and the compressibility of the flowing medium

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Velocity distribution for flow between two fixed parallel plates

Is zero at the plates and increases linearly to the midplane

None of these

Varies parabolically across the section

Is constant over the entire cross-section

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Which of the following is the most common pump for pumping either raw sewage or sludge?

Electromagnetic pump

Centrifugal pump

Reciprocating pump

Gear pump

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Which of the following produces maximum pressure difference for transportation of gases?

Compressors

Blowers

Fans

Vaccum pumps

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