Hydraulics Online Test – Paper 3

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

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

3. The viscosity of liquids varies with temperature

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

5. Specific weight of sea water is more than that of pure water because of

6. The maximum velocity in an open channel occurs

7. *Barometers are used to measure

8. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

9. *The atmospheric pressure varies with

10. *1 m head is equivalent to

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

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

13. Cavitations in flowing fluid occurs when

14. When the pipes are connected in parallel, the total loss of head

15. For uniform flow in the channel

16. Water belongs to

17. One horsepower is equal to

18. *Piezometers are used to measure

19. A steady uniform flow is through a

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

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

22. The term P/pg is known as

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

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

25. *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

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

27. *An ideal flow of a liquid obeys

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

29. *To measure atmospheric pressure, we use

30. 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

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

32. *If the velocity, pressure, density, etc., do not change at a point with respect to time, the flow is called

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

34. *Head loss increases with

35. In a venturimeter, the divergent cone is kept

36. The term z is known as

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

38. Hydraulic gradient line for an open flow channel is

39. *The orifice used for low discharge is

40. 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)

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

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

43. Velocity of flow may be determined using:

44. *The hydraulic ram is a device

45. "Manning's formula is used for

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

47. The viscosity of gases varies with temperature

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

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

50. The flow in which each liquid particle has a definite path is called