Hydraulics Online Test – Paper 3

1. Which of the following quantities are dimensionless?

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

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

4. In a flowing liquid, a particle may possess

5. *Manometers are used to measure

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

7. *The most economical section of a circular channel for the maximum velocity is when

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

9. Weber number is the ratio of inertia force to

10. Euler's number is the ratio of

11. *The term v^2/2g is known as

12. Cavitations is collapsed by

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

14. *The floating method is used for the measurement of

15. Cavitations in flowing fluid occurs when

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

17. *The magnitude of water hammer depends upon

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

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

20. Mach number is the ratio of inertia force to

21. *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

22. 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

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

24. An intensifier is used to increase

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

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

27. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

28. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

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

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

31. Water hammer is a phenomenon that occurs

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

33. The depth of flow after the hydraulic jump is

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

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

36. *Molecules of fluids get attracted due to

37. The profile of rising water on the upstream side of the dam is called

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

39. Liquids

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

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

42. *Water cushion is used to

43. *A pitot tube is used to measure

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

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

46. *Surface tension is the force

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

48. 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)

49. *Pressure head is given by

50. A siphon is an