Hydraulics Online Test – Paper 3

1. Liquids or fluids

2. The most efficient channel section is

3. *Piezometers are used to measure

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

5. *To measure very low pressure, we use:

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

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

8. *Uniform flow is said to occur when

9. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of channels is made by comparing

10. When the pipes are connected in parallel, the total loss of head

11. *The pressure in pipe flow is normally

12. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its

13. Hydraulic gradient line for an open flow channel is

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

15. Critical depth (he) is given by (where q= rate of flow per unit width of channel)

16. *The rate of flow through a V-notch varies as:

17. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

18. *Capillarity of water is

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

20. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

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

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

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

24. Mouthpieces are used to measure

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

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

27. *Pressure within a soap bubble is

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

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

30. The viscosity of gases varies with temperature

31. Falling drops of water become spheres due to

32. *An independent mass of a fluid does not possess

33. 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)

34. *To measure atmospheric pressure, we use

35. *Viscosity of a liquid

36. Cavitations is collapsed by

37. *Bernoulli's equation is applied to

38. Specific energy of a flowing fluid per unit weight is equal to

39. *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

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

41. Velocity of flow may be determined using:

42. Weber number is the ratio of inertia force to

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

44. *The orifice used for low discharge is

45. *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

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

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

48. Water belongs to

49. *Differential manometers are used to measure

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