Hydraulics Online Test – Paper 3

1. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

2. A fluid particle may possess the displacement of

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

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

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

6. *The pressure in pipe flow is normally

7. *An ideal flow of a liquid obeys

8. *Water cushion is used to

9. In a flowing liquid, a particle may possess

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

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

12. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

13. For the same specific force, the two depths at which the same discharge occurs are called

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

15. *An independent mass of a fluid does not possess

16. Crest of a weir is lower than d/s water level

17. *Total energy line (T.E.L) represents the sum of

18. *A flow is said to be laminar when

19. *To measure atmospheric pressure, we use

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

21. The inlet length of a venturimeter

22. *Pressure head is given by

23. *Cipolleti weir is a

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

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

26. *Bernoulli's equation is applied to

27. The term z is known as

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

29. *The orifice used for low discharge is

30. *A stepped notch is a combination of

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

32. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

33. *The hydraulic ram is a device

34. The difference in pressure head measured by a mercury-oil differential manometer for a 20 cm difference of mercury level will be (specific gravity of oil-0.8)

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

36. *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

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

38. The viscosity of gases varies with temperature

39. The Manning's formula for flow in an open channel is given by

40. Water hammer is a phenomenon that occurs

41. *1 m head is equivalent to

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

43. In an open channel flow

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

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

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

47. *Losses are more in

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

49. Weber number is the ratio of inertia force to

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