Hydraulics Online Test – Paper 3

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

2. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

3. Poise is the unit of

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. A siphon is used

6. Euler's number is the ratio of

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

8. In a venturimeter, the divergent cone is kept

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

10. Gauge pressure is

11. The viscosity of gases varies with temperature

12. Which of the following is the example of laminar flow?

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

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

15. *Molecules of fluids get attracted due to

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

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

18. *The rate of flow through a venturimeter varies as

19. Total head of a particle in motion is the sum of

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

21. *The notch angle for the maximum discharge over a triangular notch is

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

23. Which of the following quantities are dimensionless?

24. *Cavitations is caused by

25. Water belongs to

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

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

28. The thickness of a sharp-crested weir is kept less than

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

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

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

32. Open channel flow is

33. "Manning's formula is used for

34. 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.)

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

36. *Capillary rise is proportional to

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

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

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

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

41. 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)

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

43. The ratio of the mean velocity to the surface velocity in open channels is equal to

44. *Bernoulli's equation assumes that

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

46. *Cipolleti weir is a

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

48. *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

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

50. The inlet length of a venturimeter