what kinds of questions may employers of chemcial engineering companies ask ?1.Tell me about your self ? (They will test your way of talking and english)2.In which are you intrested? (mass tr. or heat tr. and etc..)3.For freshers most of the qns will come from Mass tr. and heat tr.4.In which are you intrested to work? (procee, production and etc.,)5.And some general qns like.....If you are the manager or MD of this company this company then how you will control the employer and how you will feel and etc...Most Often Asked Quesions In Interviews1. Do you have any idea on recombinant protein expression?2. Do you have recombinant protein expression experience? Explain?3. Explain the Deacon reaction?4. Explain various protein purification techniques?5. For a centrifugal pump if the pump is running and we close the discharge valve what is the effect?6. How is plate heat exchangers used in an ammonia refrigeration system?7. How can we derive power factor equation p=vi cos phi?8. How can we measure entropy?9. How FOULING effected the heat transfer rate?10. How much experience you are having in commercial software for protein design?11. How much maximum power can be generated by 320v, 10kg-cm synchronous motor if shaft is rotated mechanically at 50 to 60 rpm?12. Is it possible to compare the resistance to chloride attack of several materials of construction?13. Is petroleum a mixture of hydrocarbon?14. What are some good estimates for heat transfer coefficients for coils in tanks?15. What are the affinity laws associated with dynamics pumps?16. What are the effects of oils on the properties of polyolefins?17. What are the precautions u are taking while starting HT motors?18. What are the steps involved in wine making?19. What can cause bulk solids to stop flowing from a bin?20. What does the catalytic converter on an automobile do?21. What is a good estimate for the absolute roughness for epoxy lined carbon steel pipe?22. What are the main terms in Unit Operations? What are its characteristics?23. What is difference between overall heat transfer coefficient & individual heat transfer coefficient?24. What is load and what are the types of load?25. What are the apt definitions for apparent power, active power and reactive power? Explain about different types of lamps?26. What is the difference between horizontal and vertical heat exchanger?27. What is the discharge pressure formula, for calculating discharge pressure?28. What is the Import Procurement Cycle? What are the customization steps in SAP?29. What is the meaning of flaring?30. What is the most common cause of solid size segregation in bulk solid systems?31. What is the purpose of capacitor? What does capacitor load means? How does it connect?32. What is the speed of a rotary drier?33. What is the symbol of sodium?34. What are the various utilities of the process plant?35. What is unit operation?36. What regulates, or gives a substance the viscosity it has?37. What steps can be taken to avoid stress corrosion cracking (SCC) in steel vessels used for storing anhydrous ammonia?38. Which is more effective, a single extraction with a large volume of solvent or several small volume extractions? Explain.39. Which reformer efficiency wise best?40. Which thing is responsible for making petroleum?41. Why is post-weld heat treatment sometimes necessary for welded vessels?42. What is happening when paint dries?43. What is an additive?44. What is a good source of information for the design of pressure vessels?45. What are some of the consequences of an undersized kettle type re boiler?46. Explain the functioning of a three-way catalytic converter.47. How does a tank-blanketing valve operate?48. What does the catalytic converter on an automobile really do?49. What is a common failure mechanism for above ground atmospheric storage tanks?50. What are some common precipitating agents used to remove metals from aqueous waste streams?51. Are there any methods of preventing cracking of carbon steel welds in refining environments?52. What type of flow measurement devices is best for slurries?53. What chemical is used to expand air bags in such a short amount of time?54. What is the best way to configure a bypass line in slurry services?55. What is the basis of choosing the shell side and tube side fluid?56. Why the efficiency of multiple effect evaporate is less then single effect evaporater57. How to calculate freezing point of a blend of two mixtures with known freezing points,compositions mathematically?58. What is the difference between unit operation and unit process59. Explain the designing of distillation column60. Why activity is so useful than considering partial pressure in thermodynamics point of view?61. You have two layer of material to provide insulation. They have heat transfer co-efficient (k1>k2).How will you obtain better insulation?62. How can a chemical production engineer improve the process with respect to yield & quality?63. How to conduct the vapor-liquid equilibrium (vle) experiment at atmopheric pressure?64. How to conduct the vle experiment at atmospheric pressure?65. How to conduct vapor liquid equilibrium experiment?66. What is unit process and unit operations? How they are different from one another?67. How to calculate freezing point of a blend of two mixtures with known freezing points,compositions mathematically?68. Difference between distillation and fractionation?69. Why it takes more time to distill out water than toluene?70. What is 3rd law of thermodynamics?71. Explain what is wilson equation?72. What is the role of software in process equipment design and what software should one refer to while dealing with related problems?73. What is the role of fugacity in distillation column?74. Can bernaulli's theorem be applied on gases?75. What is pseudo pressure ?76. What is difference between micro-organisms & micro pollutants?77. What can be done should compressors are working but get radiated imediately and stop working?78. What is the role of the chemical engineer in the agricultural sector?79. How to perform distillation of a mixture of unknown solutions ?80. Why we use flaring in the crude oil refining industry?81. What is the life time of frp tank? Explain about it specifications & other details?82. Why do we place hydrogen cylinder horizontal position rahter than vertical position?83. Why iron carbide diagram can be established upto 6.67% only? What are structure beyond 6.67% carbon.84. What is unit operation?85. When salt is added to water, what happens to its freezing point?86. What is corrosion? Which is the most important material used for metallic coating?87. What is turkey red oil? Where it is used and how it can be formed?88. What are the major characteristics of a metal which distinguishes itself from any other metal?89. How does chromium improve property of steel when added as an alloy element?90. What is are the main terms in unit operations? And what is its charecteristics?91. What is the important properties of biodegradable plastics? which properties helps plastics to resist water?92. Ammonium thiosulphate is impurity in ammonium bi sulphite. Outline a proper and accurate method of testing this impurity.93. Why 's' sub-shell has a spherical structure?94. What is the solid angle?95. What is the density of water at 0c?96. How does actual capillary action takes place?97. What is physical significance of chemical potential & fugacity?98. Do you have experience with commercial software for protein design?99. What is pointage in chemistry?100. Discuss the important properties of solvent used in leaching?101. How to design knock out drum? (vertical kod to remove condensate from natural gas, basic idea of books and related formulae and important notes to remember while designing it)102. Explain me what is floudas in detail?103. What are the basis for selecting deaerator operating pressure and temperature?104. What is proplan, prodyne?105. How to seperate water from benzene?106. Do you have antibody design experience?107. Indicate the number of years you have been supervising others in a lab environment: none less than 1 year1 - 2 years3 - 5 years6 - 10 yearsmore than 10 years108. How to calculate freezing point of a blend of two mixtures with known freezing points,compositions mathematically?109. How to conduct the vle experiment at atmospheric pressure?110. How to conduct vapor liquid equilibrium experiment?111. What can be done should compressors are working but get radiated imediately and stop working?112. What is the important properties of biodegradable plastics? which properties helps plastics to resist water?113. For a given bulk solid how can the particle size distribution be determined?114. What are the different characteristics that can affect the flow of bulk solids and how?115. What do you understand by Wet bulb Globe temperature?116. In case of welded vessels why is stress relieving in the form of post-weld treatment necessary?117. What significance the angle of repose holds in the chemical industry, Explain?118. What are the design considerations for a piping system for the transfer of slurries?119. What are the problems that are associated with the expansion joints?120. What is the method involved in analyzing powders for composition?121. What are the methods involved to test helium leak testing in a vacuum system?122. What are the criterias involved in choosing mass balances for components?123. What are the assumptions made on conservation equation?124. What is the procedure to estimate the friction factor involved in heat exchanger tubes?125. What is the use of gear pumps in motor?126. What are the factors involved in considering the choice of dry screw compressor?127. What is the process of including heat exchangers in ammonia refrigeration system?128. What is the method adopted to minimize shell side pressure drop in a shell?129. What are the strategies acquired to cure tube vibration and exchangers in a shell?130. What are the factors involved in designing kettle type reboiler?131. What are the steps taken to operate a tank-blanketing valve?132. What are the steps required to design a vapor-liquid separator or flash drum?133. Why does catalytic converter used in an automobile?134. What are the different ways in which solids can be blended?135. What are the different ways in which solids can be blended?136. What are the different types of equipments for the conveyance of solids?137. What are the reasons of removal of particles from effluent gas?138. In a crusher where is the energy provided to it is used up for?139. On what basis are materials to be crushed evaluated apart from size?140. What are the advantages of using a ball mill over other conventional methods of crushing?141. Mention some of the specialized grinding and crushing methods.142. What are the assumptions made for Kynch Theory?143. What are the merits of using a falling film evaporator?