Hydraulics Online Test – Paper 3

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

2. *Bernoulli's equation assumes that

3. *Stoke is the unit of

4. *If a pitot tube is placed with its nose facing downstream, the liquid

5. Which of the following quantities are dimensionless?

6. The term z is known as

7. An intensifier is used to increase

8. *Differential manometers are used to measure

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

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

11. The two depths at which the specific energy is the same are called

12. 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

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

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

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

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

17. The minimum head loss will occur in

18. Hydraulic gradient line and total energy line are

19. 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

20. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

21. The pressure difference between inside and outside of a droplet of water is given by (Where σ is surface tension and d is the diameter of the droplet.)

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

23. The thickness of a sharp-crested weir is kept less than

24. For uniform flow in the channel

25. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in...

26. *Piezometers are used to measure

27. 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.

28. *The atmospheric pressure varies with

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

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

31. When the pipes are connected in series, the total rate of flow

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

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

34. *Pressure head is given by

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

36. In an open channel flow

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

38. The depth of flow after the hydraulic jump is

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

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

41. The inlet length of a venturimeter

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

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

44. *A stepped notch is a combination of

45. *Which of the following statements is valid?

46. For the same specific force, the two depths at which the same discharge occurs are called

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

48. Chazy's formula is used to determine

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

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