Hydraulics Online Test – Paper 3

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

2. *The hydraulic ram is a pump that works on

3. *A pitot tube is used to measure

4. *Uniform flow is said to occur when

5. 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

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

7. As per our convenience which one is correct with respect to the dimensionless number?

8. For uniform flow in the channel

9. *Losses are more in

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

11. *Rotameter is used for measuring

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

13. *The width of a weir with end contraction is

14. *To measure very low pressure, we use:

15. *An ideal flow of a liquid obeys

16. Falling drops of water become spheres due to

17. *A flow is said to be laminar when

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

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

20. *The hydraulic ram is a device

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

22. The depth of flow at which the specific energy is minimum is called

23. *Stoke is the unit of

24. The viscosity of gases varies with temperature

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

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

27. Poise is the unit of

28. *Capillary rise is proportional to

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

30. *Head loss increases with

31. *Surface float is used to measure

32. A fluid particle may possess the displacement of

33. Hydraulic gradient line for an open flow channel is

34. At the vena contracta, the jet has the minimum cross-sectional area, and so the velocity of the liquid at this section will be

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

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

37. The pressure less than atmospheric pressure is known as

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

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

40. With a clinging nappe of a weir, the excess discharge is

41. 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

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

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

44. *Hydraulic gradient is equal to

45. 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)

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

47. The term P/pg is known as

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

49. When the pipes are connected in parallel, the total loss of head

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