Hydraulics Online Test – Paper 3

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

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

3. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

4. *The float method is used to measure

5. *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

6. Which of the following quantities are dimensionless?

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

8. In an open channel flow

9. Mouthpieces are used to measure

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

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

12. 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

13. Liquids

14. The pressure less than atmospheric pressure is known as

15. Water belongs to

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

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

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

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

20. In an open channel flow

21. The section of the Jet leaving an orifice, having the minimum cross-section area, is called

22. *An orifice is called a large orifice if the water head is

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

24. A steady uniform flow is through a

25. *Molecules of fluids get attracted due to

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

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

28. Open channel flow is

29. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

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

31. The minimum head loss will occur in

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

33. 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

34. Which of the following has the highest coefficient of discharge:

35. *The hydraulic radius is equal to

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

37. Cavitations is collapsed by

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

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

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

41. *Stoke is the unit of

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

43. A siphon is an

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

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

46. Super-critical flow occurs in

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

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

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

50. In an open channels the analysis of a sugar is done by using