Hydraulics Online Test – Paper 3

1. 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

2. *Cipolletti weir is a trapezoidal weir having a side slope of

3. 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)

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

5. 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)

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

7. Weber number is the ratio of inertia force to

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

9. *Capillary rise is proportional to

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

11. Hydraulic gradient line for an open flow channel is

12. *Differential manometers are used to measure

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

14. Gauge pressure is

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

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

17. The minimum head loss will occur in

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

19. *Uniform flow is said to occur when

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

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

22. 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.)

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

24. *Pascal's law states that pressure at a point is equal in all directions

25. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

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

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

28. *1 m head is equivalent to

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

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

31. *The atmospheric pressure varies with

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

33. The depth of flow after the hydraulic jump is

34. *The flow in which the path of individual particles of liquid cross each other is called

35. *The pressure in pipe flow is normally

36. The water immediately downstream of the conduit or weir is called

37. Cavitations is collapsed by

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

39. In an open tube, the free surface of mercury remains

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

41. *Venturimeter is used to measure

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

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

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

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

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

47. The maximum velocity in an open channel occurs

48. *Orifice-meter is used to measure:

49. *A pitot tube is used to measure

50. *Cipolleti weir is a