Hydraulics Online Test – Paper 3

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

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

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

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

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

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

7. *The orifice used for low discharge is

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

9. *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

10. The maximum velocity in an open channel occurs

11. 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)

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

13. With a clinging nappe of a weir, the excess discharge is

14. Liquids or fluids

15. 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.)

16. 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

17. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

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

19. Euler's number is the ratio of

20. *The condition for the maximum velocity and discharge is given by (closed flow)

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

22. *A flow is said to be laminar when

23. *The equation of continuity of fluids is applicable only if

24. *Manometers are used to measure

25. The term P/pg is known as

26. For uniform flow in the channel

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

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

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

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

31. *A pitot tube is used to measure

32. A ideal fluid

33. Crest of a weir is lower than d/s water level

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

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

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

37. A fluid particle may possess the displacement of

38. In a venturimeter, the divergent cone is kept

39. Falling drops of water become spheres due to

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

41. Water belongs to

42. An intensifier is used to increase

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

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

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

46. Gauge pressure is

47. If the specific gravity of oil is 0.7, then find the density of oil

48. *The hydraulic radius is equal to

49. 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)

50. A siphon is an