Hydraulics Online Test – Paper 3

1. The maximum velocity in an open channel occurs

2. A siphon is an

3. Super-critical flow occurs in

4. One horsepower is equal to

5. *To measure atmospheric pressure, we use

6. Water hammer is a phenomenon that occurs

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

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

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

10. 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

11. *Losses are more in

12. *The actual velocity through an orifice is........... than the theoretical velocity.

13. The water immediately downstream of the conduit or weir is called

14. *An independent mass of a fluid does not possess

15. The upward water pressure at the base of the structure is called

16. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called

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

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

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

20. *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

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

22. The pressure less than atmospheric pressure is known as

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

24. An intensifier is used to increase

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

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

27. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in...

28. The term z is known as

29. *Cipolletti weir is a trapezoidal weir having a side slope of

30. *Uniform flow is said to occur when

31. The term P/pg is known as

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

33. *Orifice-meter is used to measure:

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

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

36. *The main assumption of Bernoulli's equation is

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

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

39. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

40. 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

41. In an open channels the analysis of a sugar is done by using

42. Specific energy of a flowing fluid per unit weight is equal to

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

44. *A flow is said to be laminar when

45. *Molecules of fluids get attracted due to

46. The inlet length of a venturimeter

47. *Back water curve is caused if there is a

48. *Hydraulic gradient is equal to

49. *Head loss increases with

50. Specific weight of liquid