Hydraulics Online Test – Paper 3

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

2. For a long pipe, the head loss

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

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

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

6. *Surface float is used to measure

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

8. The pressure less than atmospheric pressure is known as

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

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

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

12. The numerical value of vorticity is.....of the rotation

13. *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

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

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

16. *To measure very low pressure, we use:

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

18. 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

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

20. *A flow is said to be laminar when

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

22. *Head loss increases with

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

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

25. *Piezometers are used to measure

26. *An ideal flow of a liquid obeys

27. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

28. Super-critical flow occurs in

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

30. Hooke's law for solids is analogous to

31. *A pitot tube is used to measure

32. *Water cushion is used to

33. *Orifice-meter is used to measure:

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

35. Mach number is the ratio of inertia force to

36. 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

37. Reynolds number is the ratio of initial force and

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

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

40. The term P/pg is known as

41. *Bernoulli's equation is applied to

42. *Stoke is the unit of

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

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

45. *To measure atmospheric pressure, we use

46. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

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

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

49. The attraction among different particles of the same material is

50. An intensifier is used to increase