First power of its dimeter
Inverse of the fluid viscosity
Inverse square of the diameter
Square of the difference in specific weights of solid & fluid
✅ The correct answer is option B.
Fluid Mechanics MCQs
492. Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
Increase
Decrease
Not change
Exponentially decrease
✅ The correct answer is option A.
493. The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.
0.25
0.5
0.66
0.95
✅ The correct answer is option D.
494. N. second/m² is
The S.I. unit of dynamic viscosity
The S.I. unit of kinematic viscosity
Equivalent to one poise
Equivalent to one stoke
✅ The correct answer is option A.
495. A pump operating under specific conditions delivers insufficient quantity of liquid. This may be set right by
Decreasing the size of the inlet pipe
Increasing the size of the inlet pipe
Lowering the pump position
Both B and C
✅ The correct answer is option D.
496. Dimension of surface tension is(where, F = force, L = length)
FL⁻¹
F⁻¹ . L
F.L⁻²
F⁻² . L
✅ The correct answer is option A.
497. Cavitation occurs in a centrifugal pump when the suction pressure is
Less than the vapour pressure of the liquid at that temperature
Greater than the vapour pressure of the liquid at that temperature
Equal to the vapour pressure
Equal to the developed head
✅ The correct answer is option A.
498. Drag co-efficient in hindered settling is __________ that in free settling.
Less than
Equal to
Not necessarily greater than
Always greater than
✅ The correct answer is option D.
499. Fanning friction factor equation applies to the __________ fluid flow.
Non-isothermal condition of
Compressible
Both A and B
Neither A nor B
✅ The correct answer is option D.
500. The head loss due to sudden contraction is proportional to
Velocity
Velocity head
Turbulence
None of these
✅ The correct answer is option B.