Hydraulics Online Test – Paper 3

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

2. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

3. *An ideal flow of a liquid obeys

4. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

5. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

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

7. *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

8. The depth of flow after the hydraulic jump is

9. 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

10. Cavitations in flowing fluid occurs when

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

12. *Cipolletti weir is a trapezoidal weir having a side slope of

13. Weber number is the ratio of inertia force to

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

15. A fluid particle may possess the displacement of

16. *In flow, the liquid particles may possess

17. *Stoke is the unit of

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

19. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

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

21. *Losses are more in

22. The minimum head loss will occur in

23. *Manometers are used to measure

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

25. The term z is known as

26. *Surface float is used to measure

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

28. *Venturimeter is used to measure

29. In a flowing liquid, a particle may possess

30. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

31. Super-critical flow occurs in

32. *Piezometers are used to measure

33. *Differential manometers are used to measure

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

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

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

37. *The actual velocity through an orifice is........... than the theoretical velocity.

38. *The hydraulic ram is a device

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

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

41. *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

42. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

43. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

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

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

46. *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

47. *Capillarity of water is

48. Liquids or fluids

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

50. *Cavitations is caused by