Hydraulics Online Test – Paper 3

1. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is

2. In the case of vortex flow, the level of water at the center is

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

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

5. A steady uniform flow is through a

6. In an open tube, the free surface of mercury remains

7. The viscosity of liquids varies with temperature

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

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

10. Hydraulic gradient line and total energy line are

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

12. In a venturimeter, the divergent cone is kept

13. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

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

15. Hydraulic gradient line for an open flow channel is

16. *Cipolleti weir is a

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

18. *The atmospheric pressure varies with

19. The flow in which each liquid particle has a definite path is called

20. *Surface tension is the force

21. *Cavitations is caused by

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

23. *The float method is used to measure

24. The attraction among different particles of the same material is

25. *The actual velocity through an orifice is........... than the theoretical velocity.

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

27. *The orifice used for low discharge is

28. Weber number is the ratio of inertia force to

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

30. The term z is known as

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

32. 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)

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

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

35. Falling drops of water become spheres due to

36. In a flowing liquid, a particle may possess

37. *Differential manometers are used to measure

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

39. *Bernoulli's equation is applied to

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

41. *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

42. *Pressure head is given by

43. *Capillary rise is proportional to

44. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

45. *Bernoulli's equation assumes that

46. The inlet length of a venturimeter

47. The hydrostatic force exerted by 2 m deep water on the gate downstream is equal to

48. Specific weight of liquid

49. An intensifier is used to increase

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