Hydraulics Online Test – Paper 3

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

2. Flow in pipes is turbulent if the Reynolds number is

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

4. The depth of flow after the hydraulic jump is

5. *The rate of flow through a V-notch varies as:

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

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

8. An intensifier is used to increase

9. Water hammer is a phenomenon that occurs

10. Velocity of flow may be determined using:

11. *Bernoulli's theorem deals with the law of conservation of

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

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

14. *Molecules of fluids get attracted due to

15. A ideal fluid

16. Liquids or fluids

17. *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

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

19. *Losses are more in

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

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

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

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

24. 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

25. *The actual velocity through an orifice is........... than the theoretical velocity.

26. In an inclined position, a venturimeter records

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

28. *1 m head is equivalent to

29. 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

30. The term z is known as

31. *In flow, the liquid particles may possess

32. *Pressure head is given by

33. "Manning's formula is used for

34. *The pressure in pipe flow is normally

35. Liquids

36. For the same specific force, the two depths at which the same discharge occurs are called

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

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

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

40. Mouthpieces are used to measure

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

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

43. *Head loss increases with

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

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

46. *If the velocity of fluid particles varies from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be

47. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

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

49. *Bernoulli's equation assumes that

50. *Manometers are used to measure