Cd x L2g [H1 – Ha]
Cd x L2g [H13/2 – Ha3/2]
Cd x L2g [H12 – Ha2]
Cd x L2g [H15/2 – Ha5
✅ The correct answer is option B.
Hydraulics and Fluid Mechanics MCQs
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
narrow-crested weir
broad-crested weir
Ogee weir
submerged weir
✅ The correct answer is option D.
The loss of pressure head in case of laminar flow is proportional to
velocity
(velocity)2
(velocity)3
(velocity)4
✅ The correct answer is option A.
The critical depth meter is used to measure
velocity of flow in an open channel
depth of flow in an open channel
hydraulic jump
depth of channel
✅ The correct answer is option C.
The pressure of liquid at throat in a venturimeter is __________ than that at inlet.
higher
lower
✅ The correct answer is option B.
A flow is called super-sonic if the
velocity of flow is very high
discharge is difficult to measure
Mach number is between 1and 6
none of these
✅ The correct answer is option C.
A weir is usually made of masonry or concrete.
Yes
No
✅ The correct answer is option A.
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
double
four times
eight times
sixteen times
✅ The correct answer is option D.
A flow in which the viscosity of fluid is dominating over the inertia force is called
steady flow
unsteady flow
laminar flow
turbulent flow
✅ The correct answer is option C.
The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
Yes
No
✅ The correct answer is option A.