Hydraulics Online Test – Paper 3

1. Cavitations is collapsed by

2. *Surface float is used to measure

3. The pressure less than atmospheric pressure is known as

4. Water belongs to

5. To avoid an interruption in the flow of a siphon, the air vessel is provided

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

7. *The upper surface of the notch over which water flows is known as

8. *Molecules of fluids get attracted due to

9. *Head loss increases with

10. *Pressure within a soap bubble is

11. *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

12. Pick up the correct statement from the following

13. *The specific weight of water 1000 kg/m^3

14. The continuity equation

15. 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

16. Weber number is the ratio of inertia force to

17. In the case of a broad-crested weir, the depth of water h at the end of the still is given by

18. *The most economical section of a circular channel for the maximum velocity is when

19. In the case of leveling by a level pipe, the level is indicated by

20. *Back water curve is caused if there is a

21. Hydrostatic pressure on a dam depends upon its

22. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

23. In an open channel flow

24. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

25. *Chazy's formula is given by

26. *The equation of continuity of fluids is applicable only if

27. 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

28. *Bernoulli's theorem deals with the law of conservation of

29. *Hydraulic gradient is equal to

30. In an open channels the analysis of a sugar is done by using

31. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

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

33. Specific weight of sea water is more than that of pure water because of

34. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

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

36. Velocity of flow may be determined using:

37. The most efficient channel section is

38. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

39. The pressure difference between inside and outside of a droplet of water is given by (Where σ is surface tension and d is the diameter of the droplet.)

40. The Manning's formula for flow in an open channel is given by

41. Euler's number is the ratio of

42. In fluids, steady flow occurs when

43. *The hydraulic ram is a device

44. *The floating method is used for the measurement of

45. Poise is the unit of

46. *The condition for the maximum velocity and discharge is given by (closed flow)

47. A substance which deforms continuously under the action of shear stress is called

48. *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

49. *A stepped notch is a combination of

50. The basic head loss in a long pipe is: