Hydraulics Online Test – Paper 3

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

2. *Cipolleti weir is a

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

4. *Pressure head is given by

5. The most efficient channel section is

6. *Manometers are used to measure

7. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

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

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

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

11. *Capillarity of water is

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

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

14. The pressure less than atmospheric pressure is known as

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

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

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

18. *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

19. In an open channel flow

20. *Chazy's formula is given by

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

22. 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.

23. *Differential manometers are used to measure

24. "Maximum efficiency of power transmission through a pipe is

25. 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.)

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

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

28. 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

29. For the laminar flow through a circular pipe, the maximum velocity is

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

31. *Water cushion is used to

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

33. The term P/pg is known as

34. Specific weight of sea water is more than that of pure water because of

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

36. *Head loss increases with

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

38. *Rotameter is used for measuring

39. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called

40. *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

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

42. *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

43. In a venturimeter, the divergent cone is kept

44. *A stepped notch is a combination of

45. *Hydraulic gradient is equal to

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

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

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

49. *The specific weight of water 1000 kg/m^3

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