Hydraulics Online Test – Paper 3

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

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

3. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called

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

5. *The pressure in pipe flow is normally

6. The profile of rising water on the upstream side of the dam is called

7. If the density of a fluid is constant from point to point in a flow region, it is called

8. *Venturimeter is used to measure

9. In fluids, steady flow occurs when

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

11. A ideal fluid

12. *The notch angle for the maximum discharge over a triangular notch is

13. The depth of flow after the hydraulic jump is

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

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

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

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

18. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

19. *The discharge through a trapezoidal channel is maximum when

20. *The orifice used for low discharge is

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

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

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

24. Hooke's law for solids is analogous to

25. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

26. Falling drops of water become spheres due to

27. *1 m head is equivalent to

28. *The hydraulic ram is a device

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

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

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

32. 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.)

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

34. Gauge pressure is

35. Which of the following quantities are dimensionless?

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

37. Euler's number is the ratio of

38. *Capillary rise is proportional to

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

40. *The atmospheric pressure varies with

41. The viscosity of liquids varies with temperature

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

43. *The magnitude of water hammer depends upon

44. An intensifier is used to increase

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

46. *The wetted perimeter of a channel is given by

47. *Stoke is the unit of

48. In an inclined position, a venturimeter records

49. *The specific weight of water 1000 kg/m^3

50. A steady uniform flow is through a