Hydraulics Online Test – Paper 3

1. 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

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

3. The profile of rising water on the upstream side of the dam is called

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

5. The viscosity of gases varies with temperature

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

7. *To measure atmospheric pressure, we use

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

9. The error 1% in measuring H will produce a

10. *The continuity equation deals with the law of conservation of

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

12. The minimum head loss will occur in

13. *Rotameter is used for measuring

14. *An independent mass of a fluid does not possess

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

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

17. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be

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

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

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

21. *Chazy's formula is given by

22. In a flowing liquid, a particle may possess

23. To avoid an interruption in the flow of a siphon, the air vessel is provided

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

25. *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

26. *The hydraulic ram is a device

27. When the pipes are connected in parallel, the total loss of head

28. *Capillary rise is proportional to

29. A fluid particle may possess the displacement of

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

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

32. *Water cushion is used to

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

34. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

35. In an open channel flow

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

37. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

38. In fluids, steady flow occurs when

39. *Stoke is the unit of

40. Reynolds number is the ratio of initial force and

41. Hydrostatic pressure on a dam depends upon its

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

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

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

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

46. For a long pipe, the head loss

47. Cavitations is collapsed by

48. *The magnitude of capillary rise is more in:

49. Mouthpieces are used to measure

50. The most efficient channel section is