Hydraulics Online Test – Paper 3

1. *Barometers are used to measure

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

3. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

4. *A pitot tube is used to measure

5. *Chazy's formula is given by

6. The most efficient channel section is

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

8. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

9. *Surface tension is the force

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

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

12. Mouthpieces are used to measure

13. 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

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

15. The pressure less than atmospheric pressure is known as

16. Liquids

17. Gauge pressure is

18. In an open channel flow

19. The viscosity of liquids varies with temperature

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

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

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

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

24. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in...

25. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

26. For a long pipe, the head loss

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

28. For uniform flow in the channel

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

30. 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)

31. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

32. *The flow in which the path of individual particles of liquid cross each other is called

33. In a flowing liquid, a particle may possess

34. The maximum velocity in an open channel occurs

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

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

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

38. In an inclined position, a venturimeter records

39. Chazy's formula is used to determine

40. *The hydraulic ram is a device

41. *In flow, the liquid particles may possess

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

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

44. *Pressure within a soap bubble is

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

46. *The pressure in pipe flow is normally

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

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

49. *The magnitude of water hammer depends upon

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