Hydraulics Online Test – Paper 3

1. *Manometers are used to measure

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

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

4. *The magnitude of water hammer depends upon

5. *Piezometers are used to measure

6. *Pressure head is given by

7. *A flow is said to be laminar when

8. An intensifier is used to increase

9. *The hydraulic radius is equal to

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

11. *The specific weight of water 1000 kg/m^3

12. *Losses are more in

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

14. *Hydraulic gradient is equal to

15. A fluid particle may possess the displacement of

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

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

18. Euler's number is the ratio of

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

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

21. 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.)

22. Pick up the correct statement from the following

23. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

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

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

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

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

28. The viscosity of liquids varies with temperature

29. A triangular notch is preferred to a rectangular notch because

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

31. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

32. *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

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

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

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

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

37. Reynolds number is the ratio of initial force and

38. Hydraulic gradient line and total energy line are

39. For a circular channel, the wetted perimeter is given by (where θ=half the angle subtended by the water at the center and R= radius of circular channel)

40. *Which of the following statements is valid?

41. *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

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

43. 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

44. 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

45. *Bernoulli's equation is applied to

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

47. In an inclined position, a venturimeter records

48. *The float method is used to measure

49. *Pressure within a soap bubble is

50. The term P/pg is known as