Hydraulics Online Test – Paper 3

1. The error 1% in measuring H will produce a

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

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

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

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

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

7. *Piezometers are used to measure

8. The maximum velocity in an open channel occurs

9. *Bernoulli's equation assumes that

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

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

12. 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

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

14. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

15. For uniform flow in the channel

16. *The magnitude of water hammer depends upon

17. *Venturimeter is used to measure

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

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

20. *Rotameter is used for measuring

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

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

23. In a flowing liquid, a particle may possess

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

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

26. *Capillary rise is proportional to

27. *Cavitations is caused by

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

29. *Pressure head is given by

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

31. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

32. In an open channel flow

33. *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

34. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

35. An intensifier is used to increase

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

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

38. *The orifice used for low discharge is

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

40. *Pressure within a soap bubble is

41. Hydraulic gradient line for an open flow channel is

42. *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

43. *The discharge through a rectangular channel is maximum when

44. The pressure less than atmospheric pressure is known as

45. *The main assumption of Bernoulli's equation is

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

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

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

49. *The width of a weir with end contraction is

50. *Viscosity of a liquid