Hydraulics Online Test – Paper 3

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

2. 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

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

4. *To measure atmospheric pressure, we use

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

6. *Capillarity of water is

7. The capillary rise or fall of the liquid is given by

8. *Pressure head is given by

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

10. The minimum head loss will occur in

11. 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

12. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

13. Gauge pressure is

14. *The hydraulic ram is a pump that works on

15. 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

16. *Venturimeter is used to measure

17. *In flow, the liquid particles may possess

18. For a long pipe, the head loss

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

20. The depth of flow after the hydraulic jump is

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

22. *The magnitude of water hammer depends upon

23. Cavitations in flowing fluid occurs when

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

25. In a venturimeter, the divergent cone is kept

26. Open channel flow is

27. Hydrostatic pressure on a dam depends upon its

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

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

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

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

32. *The rate of flow through a V-notch varies as:

33. The viscosity of liquids varies with temperature

34. Hooke's law for solids is analogous to

35. An intensifier is used to increase

36. Hydraulic gradient line for an open flow channel is

37. *The hydraulic ram is a device

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

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

40. Cavitations is collapsed by

41. *Piezometers are used to measure

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

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

44. 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.

45. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

46. In an open channel flow

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

48. *Surface float is used to measure

49. *The atmospheric pressure varies with

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