Hydraulics Online Test – Paper 3

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

2. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

3. *Total energy line (T.E.L) represents the sum of

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

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

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

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

8. *Variation in volume of liquid with variation in pressure is called

9. *The condition for the maximum velocity and discharge is given by (closed flow)

10. 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

11. *Differential manometers are used to measure

12. 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

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

14. The viscosity of liquids varies with temperature

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

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

17. *What affects the quantity of mass of a fluid?

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

19. *Chazy's formula is given by

20. "Manning's formula is used for

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

22. *Barometers are used to measure

23. 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)

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

25. Super-critical flow occurs in

26. 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

27. In an open channel flow

28. *Pressure head is given by

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

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

31. *Head loss increases with

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

33. *Piezometers are used to measure

34. *Pressure within a soap bubble is

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

36. *In flow, the liquid particles may possess

37. The term P/pg is known as

38. Weber number is the ratio of inertia force to

39. The pressure less than atmospheric pressure is known as

40. 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)

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

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

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

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

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

46. Specific weight of liquid

47. Hydraulic gradient line and total energy line are

48. The numerical value of vorticity is.....of the rotation

49. Specific energy of a flowing fluid per unit weight is equal to

50. In an open channel flow