Hydraulics Online Test – Paper 3

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

2. 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)

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

4. Chazy's formula is used to determine

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

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

7. 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

8. In a flowing liquid, a particle may possess

9. Hydrostatic pressure on a dam depends upon its

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

11. *Uniform flow is said to occur when

12. *Differential manometers are used to measure

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

14. The depth of flow after the hydraulic jump is

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

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

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

18. *The wetted perimeter of a channel is given by

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

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

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

22. Which of the following has the highest coefficient of discharge:

23. The viscosity of liquids varies with temperature

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

25. *What affects the quantity of mass of a fluid?

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

27. *Variation in volume of liquid with variation in pressure is called

28. Water belongs to

29. The continuity equation

30. A fluid particle may possess the displacement of

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

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

33. Which of the following quantities are dimensionless?

34. *Bernoulli's equation assumes that

35. *Water cushion is used to

36. *The specific weight of water 1000 kg/m^3

37. *Molecules of fluids get attracted due to

38. The depth of flow at which the specific energy is minimum is called

39. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

40. Crest of a weir is lower than d/s water level

41. If the specific gravity of oil is 0.7, then find the density of oil

42. The most efficient channel section is

43. For a long pipe, the head loss

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

45. *Pressure within a soap bubble is

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

47. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

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

49. The profile of rising water on the upstream side of the dam is called

50. 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