Hydraulics Online Test – Paper 3

1. Hydrostatic pressure on a dam depends upon its

2. Water belongs to

3. *Water cushion is used to

4. *Venturimeter is used to measure

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

6. The inlet length of a venturimeter

7. Hooke's law for solids is analogous to

8. *The main assumption of Bernoulli's equation is

9. *If a pitot tube is placed with its nose facing sideways, the liquid

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

11. *The difference between the total energy line and the hydraulic gradient line is

12. *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

13. Reynolds number is the ratio of initial force and

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

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

16. 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.

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

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

19. In an inclined position, a venturimeter records

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

21. *Back water curve is caused if there is a

22. *In flow, the liquid particles may possess

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

24. Poise is the unit of

25. One horsepower is equal to

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

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

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

29. A fluid particle may possess the displacement of

30. The most economical section of a circular channel for the maximum discharge is when

31. *Surface float is used to measure

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

33. 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.)

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

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

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

37. *An ideal flow of a liquid obeys

38. Practical fluids possess

39. 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

40. Mouthpieces are used to measure

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

42. The term z is known as

43. Chazy's formula is used to determine

44. *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

45. 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

46. The most efficient channel section is

47. If the Froude number in open channel flow is equal to 1.0, the flow is called

48. *The difference between the total energy gradient line and the total energy line is

49. The viscosity of liquids varies with temperature

50. *Viscosity of a liquid