Fluid Mechanics mcqs

Consider Two Pipes Of Same Length And Diameter Through Which Water Is Passed At The Same Velocity. The Friction Factor For Rough Pipe Is F1 And That For Smooth Pipe Is F2. Pick Out The Correct Statement ?

Consider Two Pipes Of Same Length And Diameter Through Which Water Is Passed At The Same Velocity.

F1 < F2

Data Not Sufficient To Relate F1 & F2

F1 > F2

F1 = F2

Consider A Centrifugal Pump Having A Specific Impeller Diameter, Fixed Impeller Speed Pumping A Liquid Of Constant Density At A Particular Discharge Capacity. With Decrease In The Capacity Of The Pump, The ----------- Decreases?

Consider A Centrifugal Pump Having A Specific Impeller Diameter, Fixed Impeller Speed Pumping A Liquid Of Constant Density At A Particular Discharge Cap

All A., And C.

Bhp Required By The Pump

Head Of The Liquid Pumped

Npsh Required

Colebrook Equation For Friction Factor In Turbulent Flow Is Given By, F-0.5 = -4 Loge [(Ε/D) + (1.26/Nre √F). It Reduces To Nikuradse Equation For A Value Of (ϵ/D) Equal To ----------?

Colebrook Equation For Friction Factor In Turbulent Flow Is Given By, F-0.5 = -4 Loge [(Ε/D) + (1.26/Nre √F).

0.5

0

1

Co-Efficient Of Discharge (Cd) Is Defined As Actual Discharge/Theoretical Discharge And Is Equal To Cc . Cv; Where Cc = Co-Efficient Of Contraction And Cv = Co-Efficient Of Velocity. Cd Of An Orifice Is Usually About----------?

Co-Efficient Of Discharge (Cd) Is Defined As Actual Discharge/Theoretical Discharge And Is Equal To Cc .

0.82

0.98

0.42

0.62

Choose The Correct Set Of Dimensions Of Viscosity That Are Equivalent (Where, F, M, L, T Are Dimensions For Force, Mass, Length And Time Respectively) ?

Choose The Correct Set Of Dimensions Of Viscosity That Are Equivalent (Where, F, M, L, T Are Dimensions For Force, Mass, Length And Time Respectively) ?

Flt, Ml-1t-1

F-1l2t-1, Mlt-3

Ml-1t-3, F-1l2t

Fl-2t, Ml-1t-1

Characteristic Curves For A Centrifugal Pump Plotted Against Its Capacity Is Shown In The Diagram. X, Y And Z Denote Respectively-----------?

Characteristic Curves For A Centrifugal Pump Plotted Against Its Capacity Is Shown In The Diagram. X, Y And Z Denote Respectively-----------?

Efficiency, Head And B.H.P.

Head, Efficiency And B.H.P.

Efficiency, B.H.P. And Head

B.H.P., Efficiency And Head

Centre Of Pressure Of A Plane Surface Of Arbitrary Shape Immersed Vertically In A Static Mass Of Fluid--------?

Centre Of Pressure Of A Plane Surface Of Arbitrary Shape Immersed Vertically In A Static Mass Of Fluid--------?

Is Different For Different Fluids

Is Independent Of The Specific Weight Of The Fluid

Lies Above The Centroid Of The Plane Surface

Is At The Centroid Of The Plane Surface

Cavitation In A Pump Creates So Many Undesirable Effects. Out Of The Following, Which Is Not An Undesirable Effect Created By Cavitation ?

Cavitation In A Pump Creates So Many Undesirable Effects. Out Of The Following, Which Is Not An Undesirable Effect Created By Cavitation ?

Increase In Thrust

Develops High Pressure

Develops Noise

Decrease In Effect

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