Hydraulics Online Test – Paper 3

1. In an open channel flow

2. *The pressure in pipe flow is normally

3. *Total energy line (T.E.L) represents the sum of

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

5. From a nozzle exposed to the atmosphere, the liquid jet traverses

6. Cavitations in flowing fluid occurs when

7. *The magnitude of water hammer depends upon

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

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

10. Mach number is the ratio of inertia force to

11. *Surface float is used to measure

12. *To measure atmospheric pressure, we use

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

14. *A flow is said to be laminar when

15. In an inclined position, a venturimeter records

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

17. Which of the following quantities are dimensionless?

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

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

20. The continuity equation

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

22. *Differential manometers are used to measure

23. *Losses are more in

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

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

26. A fluid particle may possess the displacement of

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

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

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

30. An intensifier is used to increase

31. *The float method is used to measure

32. *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

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

34. Crest of a weir is lower than d/s water level

35. The maximum velocity in an open channel occurs

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

37. Poise is the unit of

38. *Manometers are used to measure

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

40. *Surface tension is the force

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

42. 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

43. The minimum head loss will occur in

44. *Bernoulli's equation assumes that

45. Specific weight of liquid

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

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

48. One horsepower is equal to

49. Total head of a particle in motion is the sum of

50. *The equation of continuity of fluids is applicable only if