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Fluid Mechanics MCQ Question with Answer

Fluid Mechanics MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 57
Capillary action is due to the

Surface tension
Cohesion of the liquid
Adhesion of the liquid molecules and the molecules on the surface of a solid
All of the above
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Question No : 58
For manometer, a better liquid combination is one having

Higher surface tension
Lower surface tension
Surface tension is no criterion
High density and viscosity
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Question No : 59
The discharge over a rectangular notch is

Inversely proportional to H3/2
Directly proportional to H3/2
Inversely proportional to H5/2
Directly proportional to H5/2
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Question No : 60
A channel is said to be of most economical cross-section, if

It gives maximum discharge for a given cross-sectional area and bed slope
It has minimum wetted perimeter
It involves lesser excavation for the designed amount of discharge
All of the above
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Question No : 61
For pipes, turbulent flow occurs when Reynolds number is

Less than 2000
Between 2000 and 4000
More than 4000
Less than 4000
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Question No : 62
Center of pressure on an inclined plane is

At the Centroid
Above the Centroid
Below the Centroid
At metacentre
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Question No : 63
The total energy line lies over the hydraulic gradient line by an amount equal to the

Pressure head
Velocity head
Pressure head + velocity head
Pressure head - velocity head
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