Hydraulics Online Test – Paper 3

1. One horsepower is equal to

2. The maximum velocity in an open channel occurs

3. The viscosity of liquids varies with temperature

4. Falling drops of water become spheres due to

5. *The energy possessed by a fluid by virtue of its existing pressure is called

6. With a clinging nappe of a weir, the excess discharge is

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

8. For uniform flow in the channel

9. *Pressure within a soap bubble is

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

11. *Surface float is used to measure

12. *Stoke is the unit of

13. An intensifier is used to increase

14. *Head loss increases with

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

16. 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.

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

18. Specific weight of sea water is more than that of pure water because of

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

20. 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.)

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

22. *Barometers are used to measure

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

24. 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)

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

26. Super-critical flow occurs in

27. *An ideal flow of a liquid obeys

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

29. *Molecules of fluids get attracted due to

30. Velocity of flow may be determined using:

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

32. Cavitations is collapsed by

33. In a venturimeter, the divergent cone is kept

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

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

36. *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

37. *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

38. *Variation in volume of liquid with variation in pressure is called

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

40. Hydraulic gradient line and total energy line are

41. In a flowing liquid, a particle may possess

42. The head of water representing in the case of HGL line is known as

43. *Orifice-meter is used to measure:

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

45. *The flow in which the path of individual particles of liquid cross each other is called

46. *Bernoulli's equation assumes that

47. The term z is known as

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

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

50. If the volume of a liquid weighing 3000 kg is 4 cubic meters, then 0.75 is its