Hydraulics Online Test – Paper 3

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

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

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. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is

5. *The pressure in pipe flow is normally

6. Falling drops of water become spheres due to

7. *Cipolleti weir is a

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

9. The error 1% in measuring H will produce a

10. *Piezometers are used to measure

11. *If fluid or flow parameters at any given instant remain the same at every point in space, it is called:

12. *The magnitude of capillary rise is more in:

13. Euler's number is the ratio of

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

15. *The orifice used for low discharge is

16. The capillary rise or fall of the liquid is given by

17. In an open channel flow

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

19. Pick up the correct statement from the following

20. *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

21. An intensifier is used to increase

22. In a flowing liquid, a particle may possess

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

24. *Barometers are used to measure

25. *Hydraulic gradient is equal to

26. *Pressure head is given by

27. *An orifice is called a large orifice if the water head is

28. *Head loss increases with

29. The maximum velocity in an open channel occurs

30. Hooke's law for solids is analogous to

31. For a long pipe, the head loss

32. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

33. *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

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

35. 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.

36. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

37. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

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

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

40. "Maximum efficiency of power transmission through a pipe is

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

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

43. *The difference between the total energy gradient line and the total energy line is

44. *The actual velocity through an orifice is........... than the theoretical velocity.

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

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

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

48. Flow in pipes is turbulent if the Reynolds number is

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

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