Hydraulics Online Test – Paper 3

1. Poise is the unit of

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

3. If the Froude number in open channel flow is less than 1.0, the flow is called

4. For a long pipe, the head loss

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

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

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

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

9. *A flow is said to be laminar when

10. An intensifier is used to increase

11. A steady uniform flow is through a

12. "Manning's formula is used for

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

14. 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.)

15. *An ideal flow of a liquid obeys

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

17. Hydrostatic pressure on a dam depends upon its

18. In a flowing liquid, a particle may possess

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

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

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

22. Pick up the correct statement from the following

23. The minimum head loss will occur in

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

25. Specific weight of liquid

26. *The rate of flow through a V-notch varies as:

27. *Barometers are used to measure

28. The pressure less than atmospheric pressure is known as

29. *Hydraulic gradient is equal to

30. *Surface float is used to measure

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

32. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

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

34. 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

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

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

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

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

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

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

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

42. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as:

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

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

45. Weber number is the ratio of inertia force to

46. *Venturimeter is used to measure

47. The most efficient channel section is

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

49. One horsepower is equal to

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