Hydraulics Online Test – Paper 3

1. 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.)

2. *Uniform flow is said to occur when

3. 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)

4. *The upper surface of the notch over which water flows is known as

5. *Capillary rise is proportional to

6. The flow in which each liquid particle has a definite path is called

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

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

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

10. Gauge pressure is

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

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

13. *The floating method is used for the measurement of

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

15. *Cavitations is caused by

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

17. *Stoke is the unit of

18. *Surface float is used to measure

19. One horsepower is equal to

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

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

22. Poise is the unit of

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

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

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

26. Specific weight of liquid

27. The numerical value of vorticity is.....of the rotation

28. In an inclined position, a venturimeter records

29. 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

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

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

32. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called

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

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

35. In an open channels the analysis of a sugar is done by using

36. Velocity of flow may be determined using:

37. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

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

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

40. Mouthpieces are used to measure

41. *To measure atmospheric pressure, we use

42. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

43. Weber number is the ratio of inertia force to

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

45. *Water cushion is used to

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

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

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

49. In the case of a broad-crested weir, the depth of water h at the end of the still is given by

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