Hydraulics Online Test – Paper 3

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

2. *In flow, the liquid particles may possess

3. The term z is known as

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

5. *The hydraulic ram is a device

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

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

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

9. The viscosity of liquids varies with temperature

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

11. *The atmospheric pressure varies with

12. Super-critical flow occurs in

13. *An ideal flow of a liquid obeys

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

15. *Head loss increases with

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

17. *The orifice used for low discharge is

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

19. *The equation of continuity of fluids is applicable only if

20. *Hydraulic gradient line (except siphon)

21. *Molecules of fluids get attracted due to

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

23. 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)

24. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

25. The maximum velocity in an open channel occurs

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

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

28. A fluid particle may possess the displacement of

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

30. *To measure atmospheric pressure, we use

31. *Bernoulli's equation is applied to

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

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

34. A substance which deforms continuously under the action of shear stress is called

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

36. Specific weight of liquid

37. Hydrostatic pressure on a dam depends upon its

38. 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)

39. Practical fluids possess

40. *Pressure within a soap bubble is

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

42. Open channel flow is

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

45. *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

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

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

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

49. The ratio of the mean velocity to the surface velocity in open channels is equal to

50. For a long pipe, the head loss