Chemical Engineering - Fluid Mechanics

46. 

Vena-contracta formed during flow of a liquid through an orificemeter has

A. minimum liquid cross-section.
B. more diameter compared to orifice diameter.
C. minimum velocity of fluid stream.
D. none of these.

Answer: Option A

Explanation:

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47. 

Pick out the Blake-Plummer equation (valid for large NRe) for fluid flow through beds of solids.

A.
B.
C.
D.

Answer: Option D

Explanation:

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48. 

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)

A. 1/μ
B. μ
C. μ2
D. 1/μ2

Answer: Option B

Explanation:

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49. 

Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.

A. increase
B. decrease
C. not change
D. exponentially decrease

Answer: Option A

Explanation:

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50. 

In continuous fluidisation

A. solids are completely entrained.
B. the pressure drop is less than that for batch fluidisation.
C. there is no entrainment of solids.
D. velocity of the fluid is very small.

Answer: Option A

Explanation:

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