Hydraulics Online Test – Paper 3

1. Water belongs to

2. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

3. Reynolds number is the ratio of initial force and

4. 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

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

6. *Chazy's formula is given by

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

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

9. Water hammer is a phenomenon that occurs

10. *Pressure within a soap bubble is

11. *To measure atmospheric pressure, we use

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

13. A ideal fluid

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

15. The maximum velocity in an open channel occurs

16. *Uniform flow is said to occur when

17. In an open channels the analysis of a sugar is done by using

18. *An independent mass of a fluid does not possess

19. *Bernoulli's equation is applied to

20. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

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. For a long pipe, the head loss

23. *The hydraulic radius is equal to

24. *Rotameter is used for measuring

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

26. The basic head loss in a long pipe is:

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

28. The pressure less than atmospheric pressure is known as

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

30. In an open tube, the free surface of mercury remains

31. *Head loss increases with

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

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

34. Velocity of flow may be determined using:

35. *The float method is used to measure

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

37. Hooke's law for solids is analogous to

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

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

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

41. *The atmospheric pressure varies with

42. 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

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

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

45. The depth of flow after the hydraulic jump is

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

47. A siphon is an

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

49. Specific weight of sea water is more than that of pure water because of

50. Hydraulic gradient line and total energy line are