Hydraulics Online Test – Paper 3

1. *Differential manometers are used to measure

2. A siphon is used

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

4. *Pressure head is given by

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

6. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

7. One horsepower is equal to

8. A substance which deforms continuously under the action of shear stress is called

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

10. 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.

11. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

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

13. *Surface float is used to measure

14. *The discharge through a rectangular channel is maximum when

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

16. A ideal fluid

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

18. *To measure very low pressure, we use:

19. *To measure atmospheric pressure, we use

20. A fluid particle may possess the displacement of

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

22. Gauge pressure is

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

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

25. 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.)

26. *A pitot tube is used to measure

27. The depth of flow at which the specific energy is minimum is called

28. *The specific weight of water 1000 kg/m^3

29. *Head loss increases with

30. *A stepped notch is a combination of

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

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

33. *Bernoulli's equation is applied to

34. Mass density of liquid (p) is given by

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

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

37. *The magnitude of water hammer depends upon

38. The water immediately downstream of the conduit or weir is called

39. The ratio of the mean velocity to the surface velocity in open channels is equal to

40. "Manning's formula is used for

41. *Chazy's formula is given by

42. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

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

44. 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

45. Mouthpieces are used to measure

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

47. Chazy's formula is used to determine

48. If the Froude number in open channel flow is more than 1.0, the flow is called

49. *The actual velocity through an orifice is........... than the theoretical velocity.

50. *A flow is said to be laminar when