Hydraulics Online Test – Paper 3

1. 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

2. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

3. If the Froude number in open channel flow is less than 1.0, the flow is called

4. *A pitot tube is used to measure

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

6. *The energy possessed by a fluid by virtue of its existing pressure is called

7. The discharge through a V-notch weir is directly proportional to:

8. The most efficient channel section is

9. *The pressure in pipe flow is normally

10. *Water cushion is used to

11. *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

12. In an inclined position, a venturimeter records

13. *In flow, the liquid particles may possess

14. The ratio of the mean velocity to the surface velocity in open channels is equal to

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

16. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

17. *A flow is said to be laminar when

18. The term P/pg is known as

19. Cavitations in flowing fluid occurs when

20. 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.)

21. *The main assumption of Bernoulli's equation is

22. *What affects the quantity of mass of a fluid?

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

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

25. Liquids or fluids

26. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

27. A steady uniform flow is through a

28. *Cipolleti weir is a

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

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

31. *The discharge through a trapezoidal channel is maximum when

32. Hooke's law for solids is analogous to

33. Falling drops of water become spheres due to

34. *The notch angle for the maximum discharge over a triangular notch is

35. *Cavitations is caused by

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

37. Super-critical flow occurs in

38. *The rate of flow through a venturimeter varies as

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

40. As per our convenience which one is correct with respect to the dimensionless number?

41. *Capillary rise is proportional to

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

43. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in...

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

45. When the pipes are connected in series, the total rate of flow

46. 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)

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

48. *Which of the following statements is valid?

49. *Orifice-meter is used to measure:

50. In a venturimeter, the divergent cone is kept