Hydraulics Online Test – Paper 3

1. Hydraulic gradient line for an open flow channel is

2. The maximum velocity in an open channel occurs

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

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

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

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

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

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

9. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

10. The term z is known as

11. *Pressure within a soap bubble is

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

13. In the case of vortex flow, the level of water at the center is

14. *Chazy's formula is given by

15. Reynolds number is the ratio of initial force and

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

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

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

19. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

20. *The hydraulic radius is equal to

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

22. An intensifier is used to increase

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

24. 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)

25. Euler's number is the ratio of

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

27. A steady uniform flow is through a

28. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

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

30. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

31. 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

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

33. Poise is the unit of

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

35. Gauge pressure is

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

37. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is

38. The depth of flow after the hydraulic jump is

39. For uniform flow in the channel

40. *Viscosity of a liquid

41. Falling drops of water become spheres due to

42. One horsepower is equal to

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

44. *Bernoulli's equation assumes that

45. Weber number is the ratio of inertia force to

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

47. *Piezometers are used to measure

48. 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

49. For the laminar flow through a circular pipe, the maximum velocity is

50. *Surface tension is the force