Hydraulics Online Test – Paper 3

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

2. Chazy's formula is used to determine

3. *Hydraulic gradient is equal to

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

5. *Viscosity of a liquid

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

7. *The rate of flow through a venturimeter varies as

8. Liquids or fluids

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

10. To avoid an interruption in the flow of a siphon, the air vessel is provided

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

12. 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

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

14. 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

15. *The types of instrument used to measure low pressure with accuracy is

16. The most efficient channel section is

17. A fluid particle may possess the displacement of

18. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

19. 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)

20. *1 m head is equivalent to

21. In the case of vortex flow, the level of water at the center is

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

23. *A pitot tube is used to measure

24. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

25. *Differential manometers are used to measure

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

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

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

29. The continuity equation

30. The depth of flow after the hydraulic jump is

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

32. *The float method is used to measure

33. The depth of flow at which the specific energy is minimum is called

34. *If a pitot tube is placed with its nose facing downstream, the liquid

35. 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

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

37. 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

38. Which of the following is the example of laminar flow?

39. Liquids

40. When the fluid is at rest, the shear stress is

41. *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

42. Practical fluids possess

43. With a clinging nappe of a weir, the excess discharge is

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

45. *Rotameter is used for measuring

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

47. A ideal fluid

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

49. The upward water pressure at the base of the structure is called

50. *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