Hydraulics Online Test – Paper 3

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

2. *Water cushion is used to

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

4. The minimum head loss will occur in

5. In an inclined position, a venturimeter records

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

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

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

9. If the Froude number in open channel flow is equal to 1.0, the flow is called

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

11. 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

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

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

14. In an open tube, the free surface of mercury remains

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

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

17. 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.)

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

19. *Bernoulli's equation assumes that

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

21. 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)

22. *Orifice-meter is used to measure:

23. *Pascal's law states that pressure at a point is equal in all directions

24. Liquids

25. *Cipolleti weir is a

26. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its

27. Chazy's formula is used to determine

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

29. *Stoke is the unit of

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

31. *The orifice used for low discharge is

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

33. In a flowing liquid, a particle may possess

34. In an open channel flow

35. The most efficient channel section is

36. *Differential manometers are used to measure

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

38. In an inclined pipe, the pressure difference at its two ends is due to

39. *Back water curve is caused if there is a

40. *The magnitude of water hammer depends upon

41. *In flow, the liquid particles may possess

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

43. *Barometers are used to measure

44. When the pipes are connected in series, the total rate of flow

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

46. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

47. 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

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

49. *Pressure head is given by

50. The upward water pressure at the base of the structure is called