Hydraulics Online Test – Paper 3

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

2. *Which of the following statements is valid?

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

4. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

5. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

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

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

8. The multiplying factor for converting one poise into MKS unit of dynamic viscosity is

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

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

11. *Cavitations is caused by

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

13. The thickness of a sharp-crested weir is kept less than

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

15. 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.

16. Cavitations is collapsed by

17. *The magnitude of water hammer depends upon

18. *Stoke is the unit of

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

20. *The upper surface of the notch over which water flows is known as

21. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

22. *The float method is used to measure

23. Mach number is the ratio of inertia force to

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

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

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

27. The most efficient channel section is

28. Euler's number is the ratio of

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

30. Specific energy of a flowing fluid per unit weight is equal to

31. *The hydraulic radius is equal to

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

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

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

35. Reynolds number is the ratio of initial force and

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

37. The profile of rising water on the upstream side of the dam is called

38. *The rate of flow through a venturimeter varies as

39. In an open channel flow

40. *Bernoulli's equation is applied to

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

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

43. If the fluid particles move in straight lines and all the lines are parallel to the surface, the flow is called

44. *The types of instrument used to measure low pressure with accuracy is

45. *Surface tension is the force

46. *Capillary rise is proportional to

47. The minimum head loss will occur in

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

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

50. 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