Hydraulics Online Test – Paper 3

1. *The magnitude of water hammer depends upon

2. *Manometers are used to measure

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

4. For a long pipe, the head loss

5. Which of the following quantities are dimensionless?

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

7. Practical fluids possess

8. The Manning's formula for flow in an open channel is given by

9. Specific weight of liquid

10. Mouthpieces are used to measure

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

12. *If the velocity of fluid particles varies from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be

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

14. A steady uniform flow is through a

15. 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

16. 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

17. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

18. In a venturimeter, the divergent cone is kept

19. *Cipolleti weir is a

20. Cavitations in flowing fluid occurs when

21. A fluid particle may possess the displacement of

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

23. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

24. Cavitations is collapsed by

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

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

27. 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)

28. Liquids or fluids

29. *A pitot tube is used to measure

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

31. The viscosity of liquids varies with temperature

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

33. *The rise of the water table, which takes place due to the transformation of the unstable shooting flow (super-critical) to the stable streaming is called

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

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

36. Flow in pipes is turbulent if the Reynolds number is

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

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

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

40. The viscosity of gases varies with temperature

41. In an inclined position, a venturimeter records

42. The pressure less than atmospheric pressure is known as

43. 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

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

45. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a rectangular notch is

46. *The most economical section of a circular channel for the maximum velocity is when

47. *If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called

48. Hydraulic gradient line for an open flow channel is

49. *The rate of flow through a venturimeter varies as

50. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)