Pipe length
Ratio of pipe diameter to orifice diameter
Type of orifice & the Reynolds number
Pipe diameter
✅ The correct answer is option A.
Fluid Mechanics MCQs
In fluid flow, the stagnation point is defined as a point, where the __________ is zero.
Flow velocity
Pressure
Total energy
All of the above
✅ The correct answer is option A.
The terminal velocity of a particle moving through a fluid varies as dpn. The value of n is equal to __________ in Stoke’s law regime.
1
0.5
2
1.5
✅ The correct answer is option C.
If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).
Q = Q₁ + Q₂ + Q₃
V₁ = V₂ = V₃
Q₁ = Q₂ = Q₃
F = f₁ + f₂ + f₃
✅ The correct answer is option A.
The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids
Having high viscosities
Moving at low velocities
Both A and B
Neither A nor B
✅ The correct answer is option C.
In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is
0.5
0.84
1.84
1.25
✅ The correct answer is option C.
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke’s law range is proportional to the
Inverse of fluid viscosity
Square of particle size
Difference in the densities of the particle & fluid
All of the above
✅ The correct answer is option D.
In laminar flow through a round tube, the discharge varies
Linearly as the viscosity
Inversely as the pressure drop
Inversely as the viscosity
As the square of the radius
✅ The correct answer is option C.
In the Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.
Directly proportional to
Inversely proportional to
Inversely proportional to the square root of
Independent of
✅ The correct answer is option B.