Hydraulics Online Test – Paper 3

1. *Viscosity of a liquid

2. *Piezometers are used to measure

3. 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.

4. 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

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

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

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

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

9. Weber number is the ratio of inertia force to

10. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

11. *Cavitations is caused by

12. *Surface float is used to measure

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

14. *Chazy's formula is given by

15. For any channel section, the specific energy increase with

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

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

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

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

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

21. *The float method is used to measure

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

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

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

25. *The atmospheric pressure varies with

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

27. In a flowing liquid, a particle may possess

28. Euler's number is the ratio of

29. Velocity of flow may be determined using:

30. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

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

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

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

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

35. Falling drops of water become spheres due to

36. *Head loss increases with

37. *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

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

39. The viscosity of liquids varies with temperature

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

41. Hooke's law for solids is analogous to

42. Liquids

43. Water hammer is a phenomenon that occurs

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

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

46. Which of the following quantities are dimensionless?

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

48. *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

49. In an open channel flow

50. A steady uniform flow is through a