Hydraulics Online Test – Paper 3

1. Velocity of flow may be determined using:

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

3. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

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

5. Specific energy of a flowing fluid per unit weight is equal to

6. In an open channel flow

7. When the fluid is at rest, the shear stress is

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

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

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

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

12. The water immediately downstream of the conduit or weir is called

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

14. *Manometers are used to measure

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

16. 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.)

17. For the laminar flow through a circular pipe, the maximum velocity is

18. *Hydraulic gradient line (H.G.L.) represents the sum of

19. *The hydraulic ram is a device

20. *Chazy's formula is given by

21. Reynolds number is the ratio of initial force and

22. 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

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

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

25. Weber number is the ratio of inertia force to

26. *The energy possessed by a fluid by virtue of its existing pressure is called

27. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

28. A siphon is used

29. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be

30. The term P/pg is known as

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

32. Hydraulic gradient line and total energy line are

33. Total head of a particle in motion is the sum of

34. 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

35. The head of water representing in the case of HGL line is known as

36. Hooke's law for solids is analogous to

37. *The pressure in pipe flow is normally

38. Practical fluids possess

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

40. Which of the following quantities are dimensionless?

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

42. *An independent mass of a fluid does not possess

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

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

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

46. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

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

48. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

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

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