steady
unsteady
✅ The correct answer is option B.
Hydraulics and Fluid Mechanics MCQs
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
1/2 depth
1/2 breadth
1/2 sloping side
1/4 (depth + breadth)
✅ The correct answer is option A.
The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.
same as
less than
more than
✅ The correct answer is option A.
The surface tension of mercury at normal temperature is __________ that of water.
same as
lower than
higher than
✅ The correct answer is option C.
When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
a triangle
a paraboloid
an ellipse
none of these
✅ The correct answer is option B.
The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid
Agree
Disagree
✅ The correct answer is option A.
The shear stress-strain graph for a newtonian fluid is a
straight line
parabolic curve
hyperbolic curve
elliptical
✅ The correct answer is option A.
The ratio of the inertia force to the gravity force is called Froude number.
Agree
Disagree
✅ The correct answer is option A.
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
expands
does not change
contracts
✅ The correct answer is option C.
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
2gH
H2g
2gH
2gH
✅ The correct answer is option D.