Hydraulics Online Test – Paper 3

1. The depth of flow after the hydraulic jump is

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

3. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

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

5. *Stoke is the unit of

6. For a long pipe, the head loss

7. Critical depth (he) is given by (where q= rate of flow per unit width of channel)

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

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

10. *Surface tension is the force

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

12. The maximum velocity in an open channel occurs

13. *Piezometers are used to measure

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

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

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

17. Water hammer is a phenomenon that occurs

18. If the specific gravity of oil is 0.7, then find the density of oil

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

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

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

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

23. *Head loss increases with

24. The inlet length of a venturimeter

25. *The discharge through a rectangular channel is maximum when

26. Euler's number is the ratio of

27. A steady uniform flow is through a

28. The capillary rise or fall of the liquid is given by

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

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

31. *Which of the following statements is valid?

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

33. 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

34. *The types of instrument used to measure low pressure with accuracy is

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

36. 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.)

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

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

39. A fluid particle may possess the displacement of

40. Crest of a weir is lower than d/s water level

41. Which of the following has the highest coefficient of discharge:

42. *Capillarity of water is

43. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

44. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

45. Specific weight of liquid

46. *The hydraulic radius is equal to

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

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

49. The term P/pg is known as

50. *Cipolleti weir is a