Hydraulics Online Test – Paper 3

1. The maximum velocity in an open channel occurs

2. Hydrostatic pressure on a dam depends upon its

3. For a long pipe, the head loss

4. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

5. *Surface tension is the force

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

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

8. 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

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

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

11. *Chazy's formula is given by

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

13. The minimum head loss will occur in

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

15. Mouthpieces are used to measure

16. A fluid particle may possess the displacement of

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

18. *Pressure head is given by

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

20. In a venturimeter, the divergent cone is kept

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

22. The water immediately downstream of the conduit or weir is called

23. *Molecules of fluids get attracted due to

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

25. Hydraulic gradient line for an open flow channel is

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

27. The viscosity of liquids varies with temperature

28. Liquids

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

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

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

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

33. The most efficient channel section is

34. A triangular notch is preferred to a rectangular notch because

35. Reynolds number is the ratio of initial force and

36. A steady uniform flow is through a

37. *Back water curve is caused if there is a

38. *Orifice-meter is used to measure:

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

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

41. Which of the following is the example of laminar flow?

42. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

43. *Hydraulic gradient is equal to

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

45. *Uniform flow is said to occur when

46. 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.)

47. The error 1% in measuring H will produce a

48. Discharge over an ogee weir remains the same as that of

49. *The types of instrument used to measure low pressure with accuracy is

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