Hydraulics Online Test – Paper 3

1. *Chazy's formula is given by

2. *A flow is said to be laminar when

3. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

4. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

5. The pressure less than atmospheric pressure is known as

6. Weber number is the ratio of inertia force to

7. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

8. The water immediately downstream of the conduit or weir is called

9. If the Froude number in open channel flow is equal to 1.0, the flow is called

10. The two depths at which the specific energy is the same are called

11. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

12. *Cavitations is caused by

13. *The orifice used for low discharge is

14. *In flow, the liquid particles may possess

15. In an open channel flow

16. The minimum head loss will occur in

17. The depth of flow after the hydraulic jump is

18. If the density of a fluid is constant from point to point in a flow region, it is called

19. *Losses are more in

20. The profile of rising water on the upstream side of the dam is called

21. *Total energy line (T.E.L) represents the sum of

22. *Variation in volume of liquid with variation in pressure is called

23. For the laminar flow through a circular pipe, the maximum velocity is

24. For the same specific force, the two depths at which the same discharge occurs are called

25. Total head of a particle in motion is the sum of

26. *The magnitude of water hammer depends upon

27. *Piezometers are used to measure

28. A fluid particle may possess the displacement of

29. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

30. For a circular channel, the wetted perimeter is given by (where θ=half the angle subtended by the water at the center and R= radius of circular channel)

31. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

32. Cavitations is collapsed by

33. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

34. *Manometers are used to measure

35. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be

36. *The wetted perimeter of a channel is given by

37. ........ is defined as the maximum increase in water level in the path of the flow of water

38. *If the velocity of fluid particles varies from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be

39. *Differential manometers are used to measure

40. *Viscosity of a liquid

41. Hooke's law for solids is analogous to

42. In an inclined pipe, the pressure difference at its two ends is due to

43. From a nozzle exposed to the atmosphere, the liquid jet traverses

44. *The pressure in pipe flow is normally

45. The section of the Jet leaving an orifice, having the minimum cross-section area, is called

46. When the fluid is at rest, the shear stress is

47. *Capillary rise is proportional to

48. *The term v^2/2g is known as

49. Liquids or fluids

50. *The continuity equation deals with the law of conservation of