Hydraulics Online Test – Paper 3

1. *Hydraulic gradient line (except siphon)

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

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

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

5. If the Froude number in open channel flow is more than 1.0, the flow is called

6. The viscosity of liquids varies with temperature

7. *Cavitations is caused by

8. The term P/pg is known as

9. *Surface tension is the force

10. Liquids or fluids

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

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

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

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

15. *Cipolleti weir is a

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

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

18. *Stoke is the unit of

19. Poise is the unit of

20. *Orifice-meter is used to measure:

21. A fluid particle may possess the displacement of

22. Super-critical flow occurs in

23. *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

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

25. 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

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

27. *In flow, the liquid particles may possess

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

29. *The flow in which the path of individual particles of liquid cross each other is called

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

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

32. Mouthpieces are used to measure

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

34. 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)

35. *What affects the quantity of mass of a fluid?

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

37. ........ is defined as the maximum increase in water level in the path of the flow of water

38. The most efficient channel section is

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

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

41. *Manometers are used to measure

42. *The imaginary line joining each head of water is called

43. For a long pipe, the head loss

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

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

46. To avoid an interruption in the flow of a siphon, the air vessel is provided

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

48. 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

49. *Capillarity of water is

50. *Surface float is used to measure