Hydraulics Online Test – Paper 3

1. Which of the following quantities are dimensionless?

2. *Hydraulic gradient line (except siphon)

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

4. *Capillary rise is proportional to

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

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

7. 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

8. *The magnitude of water hammer depends upon

9. When the fluid is at rest, the shear stress is

10. Chazy's formula is used to determine

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

12. *Surface tension is the force

13. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

14. *An ideal flow of a liquid obeys

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

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

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

18. 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

19. Hooke's law for solids is analogous to

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

21. The minimum head loss will occur in

22. *The equation of continuity of fluids is applicable only if

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

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

25. *Barometers are used to measure

26. The term z is known as

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

28. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

29. When the pipes are connected in series, the total rate of flow

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

31. *The magnitude of capillary rise is more in:

32. *If a pitot tube is placed with its nose facing downstream, the liquid

33. Mach number is the ratio of inertia force to

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

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

36. The basic head loss in a long pipe is:

37. *Head loss increases with

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

39. 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)

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

41. *Pressure head is given by

42. Falling drops of water become spheres due to

43. 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

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

45. Cavitations is collapsed by

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

47. Velocity of flow may be determined using:

48. A siphon is used

49. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

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