Hydraulics Online Test – Paper 3

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

2. A steady uniform flow is through a

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

4. 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)

5. Weber number is the ratio of inertia force to

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

7. *The hydraulic radius is equal to

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

9. A substance which deforms continuously under the action of shear stress is called

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

11. Falling drops of water become spheres due to

12. Water hammer is a phenomenon that occurs

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

14. 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

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

16. *The term v^2/2g is known as

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

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

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

20. In the case of leveling by a level pipe, the level is indicated by

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

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

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

24. *The specific weight of water 1000 kg/m^3

25. Hydraulic gradient line and total energy line are

26. 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

27. *1 m head is equivalent to

28. *Surface tension is the force

29. *Head loss increases with

30. *Rotameter is used for measuring

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

32. *Water cushion is used to

33. *Orifice-meter is used to measure:

34. The numerical value of vorticity is.....of the rotation

35. To avoid an interruption in the flow of a siphon, the air vessel is provided

36. 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.)

37. If the pressure is applied to the surface of a liquid, the liquid transmits the pressure equally in all directions is given by

38. The water immediately downstream of the conduit or weir is called

39. Mass density of liquid (p) is given by

40. The viscosity of gases varies with temperature

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

42. *The magnitude of water hammer depends upon

43. 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.

44. Which of the following quantities are dimensionless?

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

46. *Cipolleti weir is a

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

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

49. Cavitations is collapsed by

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