Hydraulics Online Test – Paper 3

1. For uniform flow in the channel

2. 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

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

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

5. *An ideal flow of a liquid obeys

6. *In flow, the liquid particles may possess

7. *The equation of continuity of fluids is applicable only if

8. In the case of leveling by a level pipe, the level is indicated by

9. Velocity of flow may be determined using:

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

11. The most economical section of a circular channel for the maximum discharge is when

12. The flow in which each liquid particle has a definite path is called

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

14. 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.)

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

16. If the Froude number in open channel flow is equal to 1.0, the flow is called

17. *The discharge through a rectangular channel is maximum when

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

19. *Chazy's formula is given by

20. *A stepped notch is a combination of

21. The two depths at which the specific energy is the same are called

22. The maximum velocity in an open channel occurs

23. Cavitations is collapsed by

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

25. In fluids, steady flow occurs when

26. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

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

28. ........ is defined as the maximum increase in water level in the path of the flow of water

29. *Head loss increases with

30. Liquids or fluids

31. 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)

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

33. The viscosity of gases varies with temperature

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

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

36. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

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

38. For any channel section, the specific energy increase with

39. *Hydraulic gradient is equal to

40. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

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

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

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

44. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

45. *Barometers are used to measure

46. In an inclined position, a venturimeter records

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

48. The thickness of a sharp-crested weir is kept less than

49. *The magnitude of water hammer depends upon

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