Hydraulics Online Test – Paper 3

1. *Stoke is the unit of

2. *To measure atmospheric pressure, we use

3. *The float method is used to measure

4. For the laminar flow through a circular pipe, the maximum velocity is

5. *The rate of flow through a V-notch varies as:

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

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

8. The inlet length of a venturimeter

9. Hooke's law for solids is analogous to

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

11. The term P/pg is known as

12. *Hydraulic gradient line (H.G.L.) represents the sum of

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

14. Falling drops of water become spheres due to

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

16. 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)

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

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

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

20. *The orifice used for low discharge is

21. *If a pitot tube is placed with its nose facing sideways, the liquid

22. *Cipolleti weir is a

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

24. *Pressure head is given by

25. Liquids or fluids

26. One horsepower is equal to

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

28. 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

29. 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

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

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

32. *The flow in which the path of individual particles of liquid cross each other is called

33. 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

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

35. *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

36. *The hydraulic radius is equal to

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

38. *A flow is said to be laminar when

39. The continuity equation

40. When the fluid is at rest, the shear stress is

41. *Hydraulic gradient is equal to

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

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

44. The maximum velocity in an open channel occurs

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

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. *The discharge through a trapezoidal channel is maximum when

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

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

50. The depth of flow after the hydraulic jump is