Fluid Mechanics Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Fluid Mechanics ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Fluid Mechanics comprehensively.

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Computer MCQS

Sciences MCQS

1.
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is_______________?

1

4/3

2

4

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2.
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?

Steady flow

Uniform flow

Incompressible flow

Frictionless flow

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3.
The motion of air mass in a tornado is a________________?

Free vortex motion

Forced vortex motion

Free vortex at center and forced vortex outside

Forced vortex at center and free vortex outside

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4.
Stream lines and path lines always coincide in case of__________________?

Steady flow

Laminar flow

Uniform flow

Turbulent flow

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5.
In steady flow of a fluid, the total accele ration of any fluid particle______________?

Can be zero

Is never zero

Is always zero

Is independent of coordinates

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6.
Hot wire anemometer is used to measure_______________?

Discharge

Velocity of gas

Pressure intensity of gas

Pressure intensity of liquid

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7.
Which of the following is used to measure the discharge ?

Current meter

Venturimeter

Pitot tube

Hotwire anemometer

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8.
Size of a venturimeter is specified by________________?

Pipe diameter

Throat diameter

Angle of diverging section

Both pipe diameter as well as throat diameter

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10.
Coefficient of velocity of venturimeter_________________?

Is independent of Reynolds number

Decreases with higher Reynolds number

Is equal to the coefficient of discharge of venturimeter

None of the above

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11.
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?

Slightly less

Slightly more

Nearly half

Equal

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12.
Coefficient of contraction for an external cylindrical mouthpiece is_________________?

1.00

0.855

0.7H

0.611

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14.
Which of the following statements is correct ?

Lower critical Reynolds number is of no practical significance in pipe flow problems.

Upper critical Reynolds number is significant in pipe flow problems.

Lower critical Reynolds number has the value 2000 in pipe flow

Upper critical Reynolds number is the number at which turbulent flow changes to laminar flow

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15.
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?

Constant over the cross section

Parabolic distribution across the section

Zero at the mid plane and varies linearly with distance from mid plane

Zero at plates and increases linearly to midpoint

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