Hydraulics Online Test – Paper 3

1. Specific weight of liquid

2. Mass density of liquid (p) is given by

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

4. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

5. The continuity equation

6. 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

7. *Pressure within a soap bubble is

8. The head of water representing in the case of HGL line is known as

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

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

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

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

13. 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.

14. *Barometers are used to measure

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

16. *Piezometers are used to measure

17. *The float method is used to measure

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

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

21. *The pressure in pipe flow is normally

22. If the Froude number in open channel flow is equal to 1.0, the flow is called

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

24. *Differential manometers are used to measure

25. *The magnitude of water hammer depends upon

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

27. *Chazy's formula is given by

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

29. *Cavitations is caused by

30. *A flow is said to be laminar when

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

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

33. *Pascal's law states that pressure at a point is equal in all directions

34. *The wetted perimeter of a channel is given by

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

36. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

37. *The difference between the total energy line and the hydraulic gradient line is

38. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

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

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

41. Weber number is the ratio of inertia force to

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

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

44. *The most economical section of a circular channel for the maximum velocity is when

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

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

47. In fluids, steady flow occurs when

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

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

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