Hydraulics Online Test – Paper 3

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

2. "Maximum efficiency of power transmission through a pipe is

3. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

4. The inlet length of a venturimeter

5. 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.)

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

7. For the same specific force, the two depths at which the same discharge occurs are called

8. *Molecules of fluids get attracted due to

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

10. 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)

11. *Piezometers are used to measure

12. *Pressure head is given by

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

14. One horsepower is equal to

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

16. Liquids or fluids

17. *Chazy's formula is given by

18. Velocity of flow may be determined using:

19. Cavitations in flowing fluid occurs when

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

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

22. *The rate of flow through a V-notch varies as:

23. The minimum head loss will occur in

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

25. Weber number is the ratio of inertia force to

26. *An ideal flow of a liquid obeys

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

28. Gauge pressure is

29. Euler's number is the ratio of

30. Hydrostatic pressure on a dam depends upon its

31. The most efficient channel section is

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

33. *Cipolletti weir is a trapezoidal weir having a side slope of

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

35. Super-critical flow occurs in

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

37. The capillary rise or fall of the liquid is given by

38. Water hammer is a phenomenon that occurs

39. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

40. *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

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

42. Poise is the unit of

43. *The difference between the total energy gradient line and the total energy line is

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

45. Falling drops of water become spheres due to

46. The term z is known as

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

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

49. 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

50. Cavitations is collapsed by