Hydraulics Online Test – Paper 3

1. Cavitations in flowing fluid occurs when

2. *Capillary rise is proportional to

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

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

5. *Bernoulli's equation is applied to

6. Gauge pressure is

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

8. 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)

9. 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.)

10. 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

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

12. 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

13. For a long pipe, the head loss

14. A siphon is an

15. *1 m head is equivalent to

16. Falling drops of water become spheres due to

17. The capillary rise or fall of the liquid is given by

18. *Surface float is used to measure

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

20. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

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

22. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

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

24. The thickness of a sharp-crested weir is kept less than

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

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

27. 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)

28. The term z is known as

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

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

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

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

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

34. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

35. *The rate of flow through a venturimeter varies as

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

37. *If a pitot tube is placed with its nose facing downstream, the liquid

38. *Hydraulic gradient line (except siphon)

39. 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

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

41. In a venturimeter, the divergent cone is kept

42. A fluid particle may possess the displacement of

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

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

45. As per our convenience which one is correct with respect to the dimensionless number?

46. If the Froude number in open channel flow is less than 1.0, the flow is called

47. *Pressure within a soap bubble is

48. The term P/pg is known as

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

50. *A stepped notch is a combination of