Hydraulics Online Test – Paper 3

1. *Uniform flow is said to occur when

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. From a nozzle exposed to the atmosphere, the liquid jet traverses

4. "Maximum efficiency of power transmission through a pipe is

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

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

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

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

9. *To measure atmospheric pressure, we use

10. In an inclined pipe, the pressure difference at its two ends is due to

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

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

13. *Surface float is used to measure

14. *The float method is used to measure

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

16. *1 m head is equivalent to

17. The Manning's formula for flow in an open channel is given by

18. A ideal fluid

19. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

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

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

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

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

25. *Bernoulli's equation assumes that

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

27. Crest of a weir is lower than d/s water level

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

29. The maximum velocity in an open channel occurs

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

31. Falling drops of water become spheres due to

32. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, 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. The minimum head loss will occur in

35. *Capillary rise is proportional to

36. "Manning's formula is used for

37. *The magnitude of water hammer depends upon

38. 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

39. *Hydraulic gradient line (H.G.L.) represents the sum of

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

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

42. In an open channel flow

43. Weber number is the ratio of inertia force to

44. Cavitations in flowing fluid occurs when

45. Flow in pipes is turbulent if the Reynolds number is

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

47. When the fluid is at rest, the shear stress is

48. An intensifier is used to increase

49. *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

50. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its