Hydraulics Online Test – Paper 3

1. *Pressure within a soap bubble is

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

3. *Stoke is the unit of

4. *Hydraulic gradient is equal to

5. In fluids, steady flow occurs when

6. If the Froude number in open channel flow is more than 1.0, the flow is called

7. *Capillary rise is proportional to

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

9. *The atmospheric pressure varies with

10. Mass density of liquid (p) is given by

11. In a venturimeter, the divergent cone is kept

12. *Orifice-meter is used to measure:

13. A fluid particle may possess the displacement of

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

15. Chazy's formula is used to determine

16. The minimum head loss will occur in

17. A siphon is an

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

19. *The magnitude of water hammer depends upon

20. If the fluid particles move in a zig-zag way, the flow is called

21. Crest of a weir is lower than d/s water level

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

23. Super-critical flow occurs in

24. Discharge over an ogee weir remains the same as that of

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

26. Open channel flow is

27. *Hydraulic gradient line (except siphon)

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

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

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

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

32. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

33. For uniform flow in the channel

34. 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)

35. Cavitations in flowing fluid occurs when

36. If the specific gravity of oil is 0.7, then find the density of oil

37. For a long pipe, the head loss

38. 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)

39. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called

40. 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

41. The numerical value of vorticity is.....of the rotation

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

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

44. The depth of flow after the hydraulic jump is

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

46. 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.

47. *The upper surface of the weir over which water flows is known as:

48. Water belongs to

49. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

50. *The width of a weir with end contraction is