Hydraulics Online Test – Paper 3

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

2. *A flow is said to be laminar when

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

4. *Viscosity of a liquid

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

6. *The pressure in pipe flow is normally

7. *Capillary rise is proportional to

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

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

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

11. Euler's number is the ratio of

12. *Barometers are used to measure

13. *Cipolletti weir is a trapezoidal weir having a side slope of

14. The basic head loss in a long pipe is:

15. *To measure very low pressure, we use:

16. *Losses are more in

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

18. Liquids or fluids

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

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

21. In fluids, steady flow occurs when

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

23. Water hammer is a phenomenon that occurs

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

25. *Stoke is the unit of

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

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

28. *Piezometers are used to measure

29. Liquids

30. The ratio of the mean velocity to the surface velocity in open channels is equal to

31. *Surface float is used to measure

32. Total head of a particle in motion is the sum of

33. When the pipes are connected in parallel, the total loss of head

34. *Head loss increases with

35. *The equation of continuity of fluids is applicable only if

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

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

38. *Bernoulli's equation assumes that

39. Cavitations in flowing fluid occurs when

40. For the laminar flow through a circular pipe, the maximum velocity is

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

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. "Maximum efficiency of power transmission through a pipe is

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

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

46. *Pressure within a soap bubble is

47. In an open channel flow

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

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

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