Hydraulics Online Test – Paper 3

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

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

3. Weber number is the ratio of inertia force to

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

5. *Water cushion is used to

6. *The equation of continuity of fluids is applicable only if

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

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

9. Falling drops of water become spheres due to

10. *Hydraulic gradient is equal to

11. *A pitot tube is used to measure

12. 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

13. 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

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

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

16. 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

17. In an open channel flow

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

19. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

20. *Rotameter is used for measuring

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

22. 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)

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

24. *Surface tension is the force

25. Super-critical flow occurs in

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

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

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

29. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of channels is made by comparing

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

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

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

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

34. *The specific weight of water 1000 kg/m^3

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

36. *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

37. *In flow, the liquid particles may possess

38. *The upper surface of the weir over which water flows is known as

39. *The floating method is used for the measurement of

40. *Cavitations is caused by

41. A ideal fluid

42. *Piezometers are used to measure

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

44. *Capillary rise is proportional to

45. The most economical section of a circular channel for the maximum discharge is when

46. If the fluid particles move in a zig-zag way, the flow is called

47. *The atmospheric pressure varies with

48. *Stoke is the unit of

49. In an inclined position, a venturimeter records

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