Hydraulics Online Test – Paper 3

1. Mouthpieces are used to measure

2. Which of the following quantities are dimensionless?

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

4. *Head loss increases with

5. For a long pipe, the head loss

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

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

8. One horsepower is equal to

9. The section of the Jet leaving an orifice, having the minimum cross-section area, is called

10. 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

11. *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

12. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

13. 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)

14. Poise is the unit of

15. Liquids

16. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

17. Chazy's formula is used to determine

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

19. Falling drops of water become spheres due to

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

21. Water hammer is a phenomenon that occurs

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

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

24. *Orifice-meter is used to measure:

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

26. *In flow, the liquid particles may possess

27. *A stepped notch is a combination of

28. *The term v^2/2g is known as

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

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

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

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

33. *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

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

35. Practical fluids possess

36. *Stoke is the unit of

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

38. Critical depth (he) is given by (where q= rate of flow per unit width of channel)

39. Super-critical flow occurs in

40. *A pitot tube is used to measure

41. *To measure atmospheric pressure, we use

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

43. *The notch angle for the maximum discharge over a triangular notch is

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

45. 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

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

47. *The magnitude of capillary rise is more in:

48. The viscosity of liquids varies with temperature

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

50. *Pressure within a soap bubble is