Hydraulics Online Test – Paper 3

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

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

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

4. *1 m head is equivalent to

5. 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.)

6. *A pitot tube is used to measure

7. The most efficient channel section is

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

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

10. A steady uniform flow is through a

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

12. "Manning's formula is used for

13. If the density of a fluid is constant from point to point in a flow region, it is called

14. *The hydraulic ram is a device

15. *The floating method is used for the measurement of

16. 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)

17. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

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

19. The error 1% in measuring H will produce a

20. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

21. Discharge over an ogee weir remains the same as that of

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

23. An oil of specific gravity 0.7 and pressure 0.14 kgf/cm^2 will have the height of oil as

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

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

26. In a venturimeter, the divergent cone is kept

27. Mach number is the ratio of inertia force to

28. In an open channel flow

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

30. *Piezometers are used to measure

31. Hydraulic gradient line for an open flow channel is

32. 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

33. Euler's number is the ratio of

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

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

36. *A flow is said to be laminar when

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

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

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

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

41. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

42. One horsepower is equal to

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

44. *Viscosity of a liquid

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

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

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

48. The depth of flow after the hydraulic jump is

49. Falling drops of water become spheres due to

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