# Hydraulics and Fluid Mechanics Multiple Choice Quiz - Set 03

## Hydraulics and Fluid Mechanics Quiz: Set 03

1. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.
True
False

2. The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.
Agree
Disagree

3. A fluid whose viscosity changes with the rate of deformation or shear strain is known as Non-Newtonian fluid.
True
False

4. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
Correct
Incorrect

5. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero.
Agree
Disagree

6. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir.
Agree
Disagree

7. The ratio of the inertia force to the surface tension force is called Weber's number.
Correct
Incorrect

8. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
Yes
No

9. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.
Agree
Disagree

10. The specific gravity has no units.
Agree
Disagree

11. The velocity at which the turbulent flow starts is known as higher critical velocity.
Yes
No

12. Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
Yes
No

13. A venturi flume is a flumed structure constructed across a channel by restricting its width.
True
False

14. A siphon is used to connect two reservoirs at different levels intervened by a high ridge.
True
False

15. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.
Agree
Disagree

16. The shear stress-strain graph for a Non-Newtonian fluid is a curve.
Correct
Incorrect

17. The specific weight of compressible fluids does not remain constant.
True
False

18. The reciprocal of Euler's number is called Newton number.
Yes
No

19. The density of a liquid in kg/m3 is numerically equal to its specific gravity.
True
False

20. The velocity of flow is same at all points in the cross-section of a channel.
True
False

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