Hydraulics Online Test – Paper 3

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

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

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

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

5. *The discharge through a trapezoidal channel is maximum when

6. Gauge pressure is

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

8. 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

9. In an inclined position, a venturimeter records

10. *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

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

12. *The hydraulic ram is a device

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

14. In a venturimeter, the divergent cone is kept

15. The viscosity of liquids varies with temperature

16. *What affects the quantity of mass of a fluid?

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

18. Practical fluids possess

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

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

21. *Manometers are used to measure

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

23. *The hydraulic radius is equal to

24. The maximum velocity in an open channel occurs

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

26. If the Froude number in open channel flow is less than 1.0, the flow is called

27. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

28. Water belongs to

29. *A flow is said to be laminar when

30. For a long pipe, the head loss

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

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

33. *The energy possessed by a fluid by virtue of its existing pressure is called

34. 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)

35. Chazy's formula is used to determine

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

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

38. 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

39. *Barometers are used to measure

40. In fluids, steady flow occurs when

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. Liquids

43. *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

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

45. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

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

47. The basic head loss in a long pipe is:

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

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

50. "Manning's formula is used for