Hydraulics Online Test – Paper 3

1. A steady uniform flow is through a

2. *The most economical section of a circular channel for the maximum velocity is when

3. A substance which deforms continuously under the action of shear stress is called

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

5. Mass density of liquid (p) is given by

6. *The orifice used for low discharge is

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

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

9. Mouthpieces are used to measure

10. *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

11. 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.)

12. The depth of flow after the hydraulic jump is

13. Velocity of flow may be determined using:

14. The term z is known as

15. Hydrostatic pressure on a dam depends upon its

16. Cavitations in flowing fluid occurs when

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

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. *Manometers are used to measure

20. Which of the following has the highest coefficient of discharge:

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

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

23. The section of the Jet leaving an orifice, having the minimum cross-section area, is called

24. The most efficient channel section is

25. 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

26. A siphon is used

27. For uniform flow in the channel

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

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

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

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

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

33. Discharge over an ogee weir remains the same as that of

34. Hooke's law for solids is analogous to

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

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

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

38. Gauge pressure is

39. Water belongs to

40. A triangular notch is preferred to a rectangular notch because

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

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

43. *1 m head is equivalent to

44. *Venturimeter is used to measure

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

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

47. 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

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

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

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