Fluid Mechanics for Chemical MCQs

724 MCQs — Chemical Engineering MCQs (Page 40 of 73)

Attempt Fluid Mechanics for Chemical Quiz

The flow of gas along a pipe in the direction of decreasing pressure causes decrease in its__________________?

A. Viscosity
B. Specific volume
C. Velocity
D. None of these

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In case of supersonic flow of a fluid through pipeline, the ‘Mach number’ is__________________?

A. 0
B. 1
C. < 1
D. > 1

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Gradually varied flow in open channel is a/an ____________ flow?

A. Steady uniform
B. Steady non-uniform
C. Unsteady uniform
D. Unsteady non-uniform

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Stoke’s law is valid, when NRe, p is less than_________________?

A. 2
B. 100
C. 2100
D. 700

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Cavitation in a centrifugal pump can be avoided by keeping the__________________?

A. Inlet pressure high
B. Outlet pressure low
C. Inlet pressure low
D. Outlet pressure high

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Momentum transfer in laminar flow of fluids results due to the_________________?

A. Viscosity
B. Density
C. Velocity gradient
D. None of these

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What is the ratio of fluid carrying capacity of two pipes having diameters d1 and d2 respectively ?

A. (d1/d2)0.8
B. (d1/d2)0.5
C. D1/d2
D. (d1/d2)2

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Mach number is important in a fluid flow problem, when the inertia and _____________ forces predominate?

A. Elastic
B. Viscous
C. Gravity
D. None of these

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Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.) ?

A. √d
B. D2/3
C. D4/5
D. D1/3

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The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?

A. Discharge
B. Suction
C. Suction minus vapor pressure of the liquid at suction temperature
D. Discharge minus vapor pressure of the liquid at the discharge temperature

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