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

3. The total energy of a liquid in motion is equal to:

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

5. *Total energy line (T.E.L) represents the sum of

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

7. As per our convenience which one is correct with respect to the dimensionless number?

8. When the pipes are connected in parallel, the total loss of head

9. Mouthpieces are used to measure

10. The term P/pg is known as

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

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

13. A steady uniform flow is through a

14. *The hydraulic ram is a pump that works on

15. One horsepower is equal to

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

17. A siphon is used

18. 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)

19. A siphon is an

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

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

22. *The upper surface of the weir over which water flows is known as

23. The term z is known as

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

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

26. *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

27. *Venturimeter is used to measure

28. Hydrostatic pressure on a dam depends upon its

29. A fluid particle may possess the displacement of

30. The viscosity of liquids varies with temperature

31. For a long pipe, the head loss

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

33. In fluids, steady flow occurs when

34. *An orifice is called a large orifice if the water head is

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

36. With a clinging nappe of a weir, the excess discharge is

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

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

39. Euler's number is the ratio of

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

41. 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.)

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

43. *The upper surface of the weir over which water flows is known as:

44. The two depths at which the specific energy is the same are called

45. *Bernoulli's equation assumes that

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

47. 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)

48. 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

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

50. *Piezometers are used to measure