Hydraulics Online Test – Paper 3

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

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

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

4. *Hydraulic gradient is equal to

5. An intensifier is used to increase

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

7. *Cipolleti weir is a

8. *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

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

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

11. Mach number is the ratio of inertia force to

12. Falling drops of water become spheres due to

13. The minimum head loss will occur in

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

15. 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

16. *To measure atmospheric pressure, we use

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

18. *Hydraulic gradient line (except siphon)

19. *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

20. *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

21. Discharge over an ogee weir remains the same as that of

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

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

24. *Which of the following statements is valid?

25. Pick up the correct statement from the following

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

27. *The types of instrument used to measure low pressure with accuracy is

28. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of channels is made by comparing

29. *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

30. *Molecules of fluids get attracted due to

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

32. If the Froude number in open channel flow is more than 1.0, the flow is called

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

34. Cavitations is collapsed by

35. *Variation in volume of liquid with variation in pressure is called

36. *A flow is said to be laminar when

37. *Hydraulic gradient line (H.G.L.) represents the sum of

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

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

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

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

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

43. 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

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

45. Velocity of flow may be determined using:

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

47. The term z is known as

48. 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.)

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

50. A siphon is an