Hydraulics Online Test – Paper 3

1. *A flow is said to be laminar when

2. Gauge pressure is

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

4. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its

5. *The pressure in pipe flow is normally

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

7. 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.)

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

9. The head of water representing in the case of HGL line is known as

10. *The main assumption of Bernoulli's equation is

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

12. The flow in which each liquid particle has a definite path is called

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

14. A siphon is an

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

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

17. Reynolds number is the ratio of initial force and

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

19. *To measure atmospheric pressure, we use

20. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

21. Mach number is the ratio of inertia force to

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

23. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

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

25. 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

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

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

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

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

30. In a flowing liquid, a particle may possess

31. *In flow, the liquid particles may possess

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

33. *Chazy's formula is given by

34. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a rectangular notch is

35. In a venturimeter, the divergent cone is kept

36. *Barometers are used to measure

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

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

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

40. Which of the following quantities are dimensionless?

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

42. A fluid particle may possess the displacement of

43. *The atmospheric pressure varies with

44. Hydraulic gradient line and total energy line are

45. *Hydraulic gradient line (except siphon)

46. *Water cushion is used to

47. *The imaginary line joining each head of water is called

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

49. The Manning's formula for flow in an open channel is given by

50. *The most economical section of a circular channel for the maximum velocity is when