Hydraulics Online Test – Paper 3

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

2. Hooke's law for solids is analogous to

3. An intensifier is used to increase

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

5. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

6. The head of water representing in the case of HGL line is known as

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

8. *Losses are more in

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

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

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

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

13. Open channel flow is

14. The total energy of a liquid in motion is equal to:

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

16. *The wetted perimeter of a channel is given by

17. 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.)

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

19. A steady uniform flow is through a

20. For a long pipe, the head loss

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

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

23. The viscosity of liquids varies with temperature

24. *The atmospheric pressure varies with

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

26. *The upper surface of the notch over which water flows is known as

27. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

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

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

30. From a nozzle exposed to the atmosphere, the liquid jet traverses

31. *Surface tension is the force

32. Practical fluids possess

33. *A stepped notch is a combination of

34. *Rotameter is used for measuring

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

36. *Hydraulic gradient line (H.G.L.) represents the sum of

37. 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

38. *To measure very low pressure, we use:

39. *The float method is used to measure

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

41. *Head loss increases with

42. *The energy possessed by a fluid by virtue of its existing pressure is called

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

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

45. Super-critical flow occurs in

46. Euler's number is the ratio of

47. *Viscosity of a liquid

48. *The orifice used for low discharge is

49. A siphon is used

50. *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