MECHANICAL UNIT OPERATIONS (MUO)
1. What are the different ways adopted for size reduction in process industries?
2. Explain the Bond’s crushing law and work index
3. Explain differential screen analysis
4. What is the ratio of actual mesh dimension in one screen to that of the next smaller screen as per Tyler’s standard scale?
5. Explain the terms Capacity and Effectiveness of screens
6. What is mixing index? Explain its significance
7. What are the different methods adopted for prevention of swirling in an agitated tank?
8. What is the difference between a clarifier and classifier?
9. Define the terms Critical speed and Centrifuging in a ball mill
10. What are the different types of impellers commonly used for agitation of liquids?
11. Write the relationships between drag coefficient and Reynolds number in various regimes of settling
12. Explain the different types of filtration
13. Explain the principle of centrifugal sedimentation
14. What are open circuit and closed circuit operations?
15. Classify the particle size measuring techniques on the basis of size range
16. Explain briefly the various flotation methods
17. Explain the principle of electrical precipitation
18. Explain the term "Terminal Settling Velocity"
19. What are the requirements for selecting a suitable filter media?
20. What are sorting classifiers?
21. Define 'sphericity' for a non-spherical particle
22. What is 'blinding' of screens?
23. Cumulative analysis for determining surface is more precise than differential analysis. Why?
24. Differentiate between Grizzlies and Trommels
25. Define Rittinger's law of crushing
26. The operating speed of a ball mill should be less than the critical speed.
27. Define angle of nip for a roll crusher
28. What is disintegrator?
29. What is flotation? Give some of its applications
30. Define 'free settling'
31. Name the commonly used centrifuges for industrial applications
32. Differentiate between a thickener and a clarifier
33. What are filter aids? Name few commonly used filter aids
34. Give the classification of filters
35. Define compressibility coefficient of the cake
36. Explain the Kozeny's equation for determining the pressure drop across the cake for batch filtration
37. Differentiate between agitation and mixing
38. What are the main types of impellers?
39. Define flow number
40. Write the physical significance of Froude's number in agitation of fluids
41. What is a screen?
42. Give the various methods for finding the size distribution of a mixture of particles
43. Define ‘Volumetric mean diameter’ of a particle
44. Increasing the capacity of screen _________ (decreases/increases) the screen effectiveness
45. What is the main difference between tube mill and ball mill?
46. Define ‘Bonds law’ of crushing
47. Give the critical speed of a ball mill
48. Explain crushing efficiency
49. What are flotation agents?
50. Define ‘Hindered settling’
51. Explain the term ‘classification’
52. Differentiate between a thickener and a clarifier
53. Define filtration
54. What is specific cake resistance?
55. Differentiate between incompressible cake and compressible cake
56. Mention some commonly used filter aids
57. Give the purposes of agitation
58. Define power number
59. Name the agitator which is suitable for mixing low viscosity fluids
60. Write the physical significance of Froude’s number in agitation of fluids
61. Give the sphericity of rasching ring whose length and diameter are equal
62. Define effectiveness of screen
63. Name the different methods of particle size measurement for fine particles
64. List out any three equipment used for storage of solids
65. Give the various methods of braking solids
66. What are crushers? Give any three
67. What do you mean by closed circuit grinding?
68. What is the disadvantage of choke crushing compared to free crushing?
69. Distinguish between 'Classifier' and 'Classifier'
70. Give any three types of centrifuge used in Industries
71. Distinguish the terms free settling and hindered settling
72. Give the functions of flotation agents
73. What is filtration?
74. Give some commonly used filter media
75. What are the advantages of filter press?
76. Define compressibility coefficient of the filter cake
77. Define power number
78. What are the important properties that influence the mixing of fluids?
79. Where Banbury mixer is used?
80. Differentiate between agitation and mixing.
81. Give the shape factor for a cylinder whose length equals its diameter.
82. In screen analysis notation +5mm/-10mm means what?
83. Define sphericity for a non-spherical particle
84. Which is the most suitable equipment for removing the fine dust particle of less than one micron dia from air?
85. Define crushing efficiency
86. What is the advantage of wet grinding over dry grinding?
87. Define work index
88. What are the factors that affect energy consumption in a ball mill?
89. Explain the term sedimentation
90. Explain the principle and application of centrifuge
91. What is froth flotation? Discuss its applications
92. The rate of filtration depends on what?
93. What are the good qualities of a filter media?
94. What are filter aids? Name few commonly used filter aids
95. Differentiate between incompressible cake and compressible cake
96. What are the purposes of agitation?
97. Define flow number
98. Name the agitator which is suitable for mixing low viscosity fluids
100. What are the types of mixers suitable for pastes and plastic masses?Interview Questions on Chemical Reaction Engineering Click Here
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