Hydraulics Online Test – Paper 3

1. Hydraulic gradient line and total energy line are

2. The viscosity of gases varies with temperature

3. In an open channel flow

4. Chazy's formula is used to determine

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

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

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

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

9. A siphon is an

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

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

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

13. 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)

14. *Bernoulli's equation assumes that

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

16. Hooke's law for solids is analogous to

17. The capillary rise or fall of the liquid is given by

18. *Bernoulli's theorem deals with the law of conservation of

19. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

20. *The term v^2/2g is known as

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

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

23. *Capillarity of water is

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

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

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

27. The inlet length of a venturimeter

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

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

30. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

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

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

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

34. *The magnitude of water hammer depends upon

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

36. In an inclined position, a venturimeter records

37. *The imaginary line joining each head of water is called

38. *The continuity equation deals with the law of conservation of

39. The depth of flow after the hydraulic jump is

40. For a long pipe, the head loss

41. An intensifier is used to increase

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

43. *Variation in volume of liquid with variation in pressure is called

44. *Barometers are used to measure

45. When the pipes are connected in series, the total rate of flow

46. A steady uniform flow is through a

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

48. *Stoke is the unit of

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

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