Hydraulics Online Test – Paper 3

1. The continuity equation

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

3. The depth of flow after the hydraulic jump is

4. The viscosity of gases varies with temperature

5. The pressure less than atmospheric pressure is known as

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

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

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

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

10. *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

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

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

13. If the Froude number in open channel flow is less than 1.0, the flow is called

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

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

16. *Hydraulic gradient line (except siphon)

17. *A stepped notch is a combination of

18. If the Froude number in open channel flow is more than 1.0, the flow is called

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

20. The total energy of a liquid in motion is equal to:

21. Poise is the unit of

22. *The atmospheric pressure varies with

23. Cavitations is collapsed by

24. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

25. In an open channel flow

26. A siphon is an

27. *The magnitude of water hammer depends upon

28. A fluid particle may possess the displacement of

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

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

31. The minimum head loss will occur in

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

33. *A flow is said to be laminar when

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

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

36. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

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

38. *Chazy's formula is given by

39. To avoid an interruption in the flow of a siphon, the air vessel is provided

40. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

41. 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

42. 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

43. *Orifice-meter is used to measure:

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

45. Which of the following quantities are dimensionless?

46. The term z is known as

47. In a flowing liquid, a particle may possess

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

49. Mouthpieces are used to measure

50. The water immediately downstream of the conduit or weir is called