Hydraulics Online Test – Paper 3

1. An intensifier is used to increase

2. *Cavitations is caused by

3. *Orifice-meter is used to measure:

4. *If the velocity of fluid particles varies from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be

5. Hooke's law for solids is analogous to

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

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

8. 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

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

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

11. *Stoke is the unit of

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

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

14. Hydraulic gradient line and total energy line are

15. Liquids or fluids

16. If the density of a fluid is constant from point to point in a flow region, it is called

17. The viscosity of liquids varies with temperature

18. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

19. *Water cushion is used to

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

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

22. Euler's number is the ratio of

23. For uniform flow in the channel

24. Hydrostatic pressure on a dam depends upon its

25. For any channel section, the specific energy increase with

26. *Head loss increases with

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

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

29. In an open channel flow

30. A fluid particle may possess the displacement of

31. The discharge through a V-notch weir is directly proportional to:

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

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

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

35. The pressure less than atmospheric pressure is known as

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

37. In an open channel flow

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

39. For the flow of liquid from an open-ended tube (nozzle) leading to the formation of a spray of liquid drops, the number generally is

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

41. 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.

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

43. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

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

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

46. 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

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

48. *Pressure within a soap bubble is

49. *An ideal flow of a liquid obeys

50. For a long pipe, the head loss