Fluid Mechanics mcqs

A Spherical Particle Is Falling Slow In A Viscous Liquid Such That Reynolds Number Is Less Than 1. Which Statement Is Correct For This Situation ?

A Spherical Particle Is Falling Slow In A Viscous Liquid Such That Reynolds Number Is Less Than 1. Which Statement Is Correct For This Situation ?

Inertial And Drag Forces Are Important

Drag, Gravitational And Buoyancy Forces Are Important

None Of The Above

Drag Force And Gravitational Forces Are Important

A Rotameter Through Which Air At Room Temperature And Atmospheric Pressure Is Flowing Gives A Certain Reading For A Flow Rate Of 100 Cc/Sec. If Helium (Molecular Weight 4) Is Used And Rotameter Shows The Same Reading, The Flow Rate (Cc/Sec) Is----------?

A Rotameter Through Which Air At Room Temperature And Atmospheric Pressure Is Flowing Gives A Certain Reading For A Flow Rate Of 100 Cc/Sec.

269

42

325

26

A Rectangular Surface 3′ × 4′, Has The Lower 3 Edge Horizontal And 6′ Below A Free Oil Surface (Sp. Gr. 0.8). The Surface Inclination Is 300 With The Horizontal. The Force On One Side Of The Surface Is (Where, Y = Specific Weight Of Water) ?

A Rectangular Surface 3′ × 4′, Has The Lower 3 Edge Horizontal And 6′ Below A Free Oil Surface (Sp. Gr. 0.8).

39.6y

48y

58y

49.2y

A Pipe Of I.D. 4 M Is Bifurcated Into Two Pipes Of I.D. 2 M Each. If The Average Velocity Of Water Flowing Through The Main Pipe Is 5 M/Sec, The Average Velocity Through The Bifurcated Pipes Is----------?

A Pipe Of I.D. 4 M Is Bifurcated Into Two Pipes Of I.D. 2 M Each.

5 √2 M/Sec

5 M/Sec

10 M/Sec

20 M/Sec

A Particle A Of Diameter 10 Microns Settles In An Oil Of Specific Gravity 0.9 And Viscosity 10 Poise Under Stoke’S Law. A Particle B With Diameter 20 Microns Settling In The Same Oil Will Have A Settling Velocity ?

A Particle A Of Diameter 10 Microns Settles In An Oil Of Specific Gravity 0.9 And Viscosity 10 Poise Under Stoke’S Law.

One Fourth As That Of A

Twice As That Of A

Same As That Of A

Four Times As That Of A

A Newtonian Liquid (Ρ = Density, Μ = Viscosity) Is Flowing With Velocity „V‟ In A Tube Of Diameter ‘D’. Let Δp Be The Pressure Drop Across The Length ‘L’. For A Laminar Flow, Δp Is Proportional To---------?

A Newtonian Liquid (Ρ = Density, Μ = Viscosity) Is Flowing With Velocity „V‟ In A Tube Of Diameter ‘D’.

Dρv2/L

Lρv2/D

Lμv/D2

Μv/L

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