Hydraulics Online Test – Paper 3

1. Mach number is the ratio of inertia force to

2. Water hammer is a phenomenon that occurs

3. Pick up the correct statement from the following

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

5. *1 m head is equivalent to

6. Liquids

7. A ideal fluid

8. The depth of flow after the hydraulic jump is

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

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

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

12. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

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

14. Liquids or fluids

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

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

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

18. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be

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

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

21. 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.)

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

23. An intensifier is used to increase

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

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

26. In an inclined position, a venturimeter records

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

28. Falling drops of water become spheres due to

29. *Water cushion is used to

30. *The pressure in pipe flow is normally

31. *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

32. *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

33. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

34. The most efficient channel section is

35. The pressure less than atmospheric pressure is known as

36. Poise is the unit of

37. The inlet length of a venturimeter

38. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

39. *Surface float is used to measure

40. *Stoke is the unit of

41. *The floating method is used for the measurement of

42. *The atmospheric pressure varies with

43. In fluids, steady flow occurs when

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

45. A fluid particle may possess the displacement of

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

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

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

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

50. If the density of a fluid is constant from point to point in a flow region, it is called