Hydraulics Online Test – Paper 3

1. 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.)

2. In the case of a broad-crested weir, the depth of water h at the end of the still is given by

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

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

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

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

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

8. The total energy of a liquid in motion is equal to:

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

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

11. Liquids

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

13. Euler's number is the ratio of

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

15. *The upper surface of the notch over which water flows is known as

16. For uniform flow in the channel

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

18. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of channels is made by comparing

19. The continuity equation

20. *Capillarity of water is

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

22. *Bernoulli's equation assumes that

23. Mouthpieces are used to measure

24. *A pitot tube is used to measure

25. *Hydraulic gradient is equal to

26. *Losses are more in

27. Hydraulic gradient line and total energy line are

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

29. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

30. The most efficient channel section is

31. Crest of a weir is lower than d/s water level

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

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

34. For a long pipe, the head loss

35. In an inclined position, a venturimeter records

36. Liquids or fluids

37. *A stepped notch is a combination of

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

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

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

41. 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

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

43. Hydrostatic pressure on a dam depends upon its

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

45. The minimum head loss will occur in

46. If the fluid particles move in a zig-zag way, the flow is called

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

48. *Which of the following statements is valid?

49. *Manometers are used to measure

50. *The wetted perimeter of a channel is given by