More than
Less than
Equal to
Either A or B
✅ The correct answer is option A.
Fluid Mechanics MCQs
Viscosity of a liquid decreases __________ with rise in temperature.
Exponentially
Linearly
Logarithmically
None of these
✅ The correct answer is option C.
The most serious disadvantage of an orificemeter is that
It is not very accurate
It is very costly
Most of the pressure drop is not recoverable
It is not suitable for measuring gas flow
✅ The correct answer is option C.
The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is
Parabolic
Flat
Flat near the wall and parabolic in the middle
Parabolic near the wall and flat in the middle
✅ The correct answer is option D.
For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
V/Vmax = (x/r)1/7
V/Vmax = (r/x)1/7
V/Vmax = (x.r)1/7
None of these
✅ The correct answer is option A.
Viscosity of water at 40°C lies in the range of
1 x 10⁻³ to 2 x 10⁻³ kg/m.s
0.5 x 10⁻³ to 1 x 10⁻³ kg/m.s
1 to 2 kg/m.s
0.5 to 1 kg/m.s
✅ The correct answer is option B.
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke’s law range is
24/NRe,p
16/NRe,p
64/NRe,p
48/NRe,p
✅ The correct answer is option A.
The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.
Elevation
Velocity
Both A and B
Neither A nor B
✅ The correct answer is option B.
Hydraulic intensifier is used for increasing the
Rate of velocity of liquid supply
Rate of flow through delivery pipeline of a pump
Intensity of pressure of the liquid
Momentum rate through delivery pipe
✅ The correct answer is option C.
The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides ‘x’ & ‘y’ is given by
2xy/(x+y)
xy/(x+y)
(x+y)/2xy
(x+y)/xy
✅ The correct answer is option A.