Hydraulics Online Test – Paper 3

1. *Which of the following statements is valid?

2. Hooke's law for solids is analogous to

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

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

5. *The magnitude of water hammer depends upon

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

7. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

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

9. *Capillary rise is proportional to

10. *Surface float is used to measure

11. In a flowing liquid, a particle may possess

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

13. *Bernoulli's equation assumes that

14. The maximum velocity in an open channel occurs

15. In an open channel flow

16. *Uniform flow is said to occur when

17. *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

18. For a long pipe, the head loss

19. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

20. *1 m head is equivalent to

21. Hydrostatic pressure on a dam depends upon its

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

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

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

25. Which of the following quantities are dimensionless?

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

27. 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.

28. *In flow, the liquid particles may possess

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

30. *Bernoulli's theorem deals with the law of conservation of

31. When the fluid is at rest, the shear stress is

32. The Manning's formula for flow in an open channel is given by

33. In an open channel flow

34. Gauge pressure is

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

36. Which of the following has the highest coefficient of discharge:

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

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

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

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

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

42. *Hydraulic gradient line (except siphon)

43. 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

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

45. The pressure less than atmospheric pressure is known as

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

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

48. Total head of a particle in motion is the sum of

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

50. Poise is the unit of