Hydraulics Online Test – Paper 3

1. For the same specific force, the two depths at which the same discharge occurs are called

2. Water belongs to

3. *If a pitot tube is placed with its nose facing sideways, the liquid

4. *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

5. 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)

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

7. The maximum velocity in an open channel occurs

8. *The upper surface of the weir over which water flows is known as

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

10. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

11. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

12. Cavitations is collapsed by

13. *The magnitude of water hammer depends upon

14. Hydraulic gradient line for an open flow channel is

15. *Piezometers are used to measure

16. The pressure less than atmospheric pressure is known as

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

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

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

20. *Back water curve is caused if there is a

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

22. *1 m head is equivalent to

23. *Bernoulli's equation is applied to

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

25. Cavitations in flowing fluid occurs when

26. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its

27. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

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

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

30. Which of the following quantities are dimensionless?

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

32. Mouthpieces are used to measure

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

34. *Surface float is used to measure

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

36. Velocity of flow may be determined using:

37. *Pressure head is given by

38. In an inclined pipe, the pressure difference at its two ends is due to

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

40. Weber number is the ratio of inertia force to

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

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

43. *Stoke is the unit of

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

45. If the Froude number in open channel flow is equal to 1.0, the flow is called

46. In an inclined position, a venturimeter records

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

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

49. The discharge through a V-notch weir is directly proportional to:

50. *The float method is used to measure