MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Polymer Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
WHAT_KIND_OF_INITIATORS_IS_USED_IN_THE_PROCESS_OF_SUSPENSION_POLYMERIZATION??$ |
| A. | oil-soluble |
| B. | water-soluble |
| C. | oil-water insoluble |
| D. | none of the mentioned |
| Answer» B. water-soluble | |
| 2. |
Which_of_the_following_is_used_as_a_stabilizer_in_suspension_polymerization?$ |
| A. | gelatin |
| B. | peroxides |
| C. | water |
| D. | carbon tetrachloride |
| Answer» B. peroxides | |
| 3. |
Which of the following polymerization is also known as pearl polymerization? |
| A. | bulk polymerization |
| B. | solution polymerization |
| C. | emulsion polymerization |
| D. | suspension polymerization |
| Answer» E. | |
| 4. |
Which of the following polymerization system prepared by solution polymerization, is heterogeneous in character? |
| A. | methyl methacrylate in solvent |
| B. | acrylonitrile in organic solvent |
| C. | ethylene in organic solvent |
| D. | all of the mentioned |
| Answer» C. ethylene in organic solvent | |
| 5. |
Which of the following is a demerit of solution polymerization? |
| A. | handling of inflammable solvents |
| B. | recovery of solvent |
| C. | chain transfer to solvent |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
How is the solvent in solution polymerization, more useful to overcome the disadvantages of bulk polymerization? |
| A. | it reduces the viscosity gain |
| B. | increases the rate of reaction |
| C. | causes chain transfer |
| D. | all of the mentioned |
| Answer» B. increases the rate of reaction | |
| 7. |
Which of the following monomer mixture is used in bulk polymerization? |
| A. | undiluted monomer |
| B. | monomer –solvent mixture |
| C. | monomer-water mixture |
| D. | none of the mentioned |
| Answer» B. monomer ‚Äö√Ñ√∂‚àö√ë‚àö¬®solvent mixture | |
| 8. |
Why does heat dissipation in bulk polymerization becomes progressively difficult with high conversions? |
| A. | increase in medium viscosity |
| B. | solubilization of polymer in the monomer |
| C. | precipitation of polymer in the monomer |
| D. | all of the mentioned |
| Answer» E. | |
| 9. |
What may be the consequence of the uncontrolled vinyl polymerization with excessive rise in temperature? |
| A. | discolouration |
| B. | thermal degradation |
| C. | branching or cross-linking |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
Which of the following initiation mechanism in vinyl polymerization, does not produce a pure polymer? |
| A. | initiator decomposition |
| B. | uncatalyzed thermal initiation |
| C. | uncatalyzed photochemical initiation |
| D. | all of the mentioned |
| Answer» B. uncatalyzed thermal initiation | |