Hydraulics Online Test – Paper 3

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

2. Discharge over an ogee weir remains the same as that of

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

4. *The most economical section of a circular channel for the maximum velocity is when

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

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

7. *The atmospheric pressure varies with

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

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

10. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its

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

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

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

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

15. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

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

17. 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)

18. *Rotameter is used for measuring

19. *The hydraulic ram is a device

20. For any channel section, the specific energy increase with

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

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

23. *An ideal flow of a liquid obeys

24. Hydrostatic pressure on a dam depends upon its

25. 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.)

26. *The width of a weir with end contraction is

27. Which of the following is the example of laminar flow?

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

29. A triangular notch is preferred to a rectangular notch because

30. 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.

31. Velocity of flow may be determined using:

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

33. The continuity equation

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

35. *Piezometers are used to measure

36. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

37. The term P/pg is known as

38. Hydraulic gradient line and total energy line are

39. *The float method is used to measure

40. *A flow is said to be laminar when

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

42. *A stepped notch is a combination of

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

44. For a long pipe, the head loss

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

46. A fluid particle may possess the displacement of

47. *Head loss increases with

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

49. *Orifice-meter is used to measure:

50. *A pitot tube is used to measure