Hydraulics Online Test – Paper 3

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

2. The thickness of a sharp-crested weir is kept less than

3. *The hydraulic radius is equal to

4. Mouthpieces are used to measure

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

6. *The rate of flow through a venturimeter varies as

7. *The discharge through a rectangular channel is maximum when

8. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

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

10. *Head loss increases with

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

12. *The width of a weir with end contraction is

13. 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

14. The pressure less than atmospheric pressure is known as

15. Cavitations in flowing fluid occurs when

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

17. Velocity of flow may be determined using:

18. A ideal fluid

19. Chazy's formula is used to determine

20. Which of the following is the example of laminar flow?

21. *Manometers are used to measure

22. Water hammer is a phenomenon that occurs

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

24. *Orifice-meter is used to measure:

25. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

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

27. *To measure atmospheric pressure, we use

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

29. Hooke's law for solids is analogous to

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

31. *The flow in which the path of individual particles of liquid cross each other is called

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

33. 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)

34. 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

35. *The magnitude of water hammer depends upon

36. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

37. *A pitot tube is used to measure

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

39. In an open channel flow

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

42. Falling drops of water become spheres due to

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

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

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

46. *Cavitations is caused by

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

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

49. Poise is the unit of

50. "Manning's formula is used for