Hydraulics Online Test – Paper 3

1. *Bernoulli's equation is applied to

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

3. 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)

4. 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.

5. *The difference between the total energy gradient line and the total energy line is

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

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

8. *Surface tension is the force

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

10. ........ is defined as the maximum increase in water level in the path of the flow of water

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

12. The discharge through a V-notch weir is directly proportional to:

13. Specific weight of sea water is more than that of pure water because of

14. Velocity of flow may be determined using:

15. In a flowing liquid, a particle may possess

16. Poise is the unit of

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

18. In an open channel flow

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

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

21. The viscosity of liquids varies with temperature

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

23. Flow in pipes is turbulent if the Reynolds number is

24. 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

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

26. Water hammer is a phenomenon that occurs

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

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

29. *Losses are more in

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

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

32. *The pressure in pipe flow is normally

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

34. *The orifice used for low discharge is

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

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

37. The term P/pg is known as

38. If the density of a fluid changes from point to point in a flow region, it is called

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

40. In fluids, steady flow occurs when

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

42. *The floating method is used for the measurement of

43. The depth of flow after the hydraulic jump is

44. The head of water representing in the case of HGL line is known as

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

46. A steady uniform flow is through a

47. *Capillary rise is proportional to

48. *The float method is used to measure

49. The maximum velocity in an open channel occurs

50. Hydraulic gradient line for an open flow channel is