Hydraulics Online Test – Paper 3

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

2. *Stoke is the unit of

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

4. In a venturimeter, the divergent cone is kept

5. The attraction among different particles of the same material is

6. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

7. The term z is known as

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

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

10. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

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

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

13. 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

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

15. The continuity equation

16. *An ideal flow of a liquid obeys

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

18. *In flow, the liquid particles may possess

19. One horsepower is equal to

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

21. 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)

22. *Water cushion is used to

23. For a long pipe, the head loss

24. *The term v^2/2g is known as

25. *Pascal's law states that pressure at a point is equal in all directions

26. *To measure atmospheric pressure, we use

27. "Manning's formula is used for

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

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

30. Reynolds number is the ratio of initial force and

31. Hydraulic gradient line for an open flow channel is

32. In an inclined position, a venturimeter records

33. *Pressure within a soap bubble is

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

35. Cavitations is collapsed by

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

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

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

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

40. *Cavitations is caused by

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

42. 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

43. *Barometers are used to measure

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

45. The basic head loss in a long pipe is:

46. ........ is defined as the maximum increase in water level in the path of the flow of water

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

48. Velocity of flow may be determined using:

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

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