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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 : 43
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

Less than twice
More than twice
Less than three times
More than three times

Question No : 44
The Francis formula for the discharge over Cipoletti weir is

1.84 LH1/2
1.84 LH
1.84 LH3/2
1.84 LH5/2

Question No : 45
Newton's law of viscosity is a relationship between

Pressure, velocity and temperature
Shear stress and rate of shear strain
Shear stress and velocity
Rate of shear strain and temperature

Question No : 46
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/2
ρ ω2 r2/4

Question No : 47
Falling drops of water become spheres due to the property of

Adhesion
Cohesion
Surface tension
Viscosity

Question No : 48
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

Equal to
Less than
More than
None of these

Question No : 49
To avoid an interruption in the flow of a siphon, an air vessel is provided

At the inlet
At the outlet
At the summit
At any point between inlet and outlet

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Physics set 1 30 Start
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