Hydraulics Online Test – Paper 3

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

2. *The float method is used to measure

3. Reynolds number is the ratio of initial force and

4. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

5. An intensifier is used to increase

6. Mach number is the ratio of inertia force to

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

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

9. *Hydraulic gradient line (except siphon)

10. *The upper surface of the notch over which water flows is known as

11. *Stoke is the unit of

12. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

13. *Cavitations is caused by

14. The depth of flow after the hydraulic jump is

15. Hydrostatic pressure on a dam depends upon its

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

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

18. *The energy possessed by a fluid by virtue of its existing pressure is called

19. *Bernoulli's equation assumes that

20. The two depths at which the specific energy is the same are called

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

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

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

24. The upward water pressure at the base of the structure is called

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

26. Hooke's law for solids is analogous to

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

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

29. ........ is defined as the maximum increase in water level in the path of the flow of water

30. The attraction among different particles of the same material is

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

32. *An ideal flow of a liquid obeys

33. *Rotameter is used for measuring

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

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

36. *Bernoulli's theorem deals with the law of conservation of

37. The pressure less than atmospheric pressure is known as

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

39. Weber number is the ratio of inertia force to

40. The error 1% in measuring H will produce a

41. 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)

42. *The wetted perimeter of a channel is given by

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

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

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

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

47. *Hydraulic gradient is equal to

48. *To measure very low pressure, we use:

49. 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

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