MCQOPTIONS
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MCQOPTIONS
This section includes 19 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. |
Which of the following properties is improved when styrene and acrylo-nitrile are copolymerized together? |
| A. | heat distortion temperature |
| B. | impact strength |
| C. | chemical resistance |
| D. | all of the mentioned |
| Answer» E. | |
| 2. |
Where is the expandable grade of polystyrene useful in? |
| A. | producing foamed products |
| B. | producing rubbery products |
| C. | making optical instruments |
| D. | none of the mentioned |
| Answer» B. producing rubbery products | |
| 3. |
Which component is present in the high impact polystyrene (HIPS) besides styrene monomer to improve only impact strength of polystyrene? |
| A. | acrylo-nitrile |
| B. | vinyl acetate |
| C. | polybutadiene |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 4. |
What is the approximate density of polystyrene in g/cm3? |
| A. | 0.96 |
| B. | 0.915 |
| C. | 1.054 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 5. |
WHICH_COMPONENT_IS_PRESENT_IN_THE_HIGH_IMPACT_POLYSTYRENE_(HIPS)_BESIDES_STYRENE_MONOMER_TO_IMPROVE_ONLY_IMPACT_STRENGTH_OF_POLYSTYRENE??$ |
| A. | acrylo-nitrile |
| B. | vinyl acetate |
| C. | polybutadiene |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 6. |
Which of the following properties is improved when styrene and acrylo-nitrile are copolymerized together?$ |
| A. | heat distortion temperature |
| B. | impact strength |
| C. | chemical resistance |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
Where is the expandable grade of polystyrene useful in?$ |
| A. | producing foamed products |
| B. | producing rubbery products |
| C. | making optical instruments |
| D. | none of the mentioned |
| Answer» B. producing rubbery products | |
| 8. |
Which of the following grade of polystyrene is well suited for the purpose of packaging applications? |
| A. | high impact (HIPS) |
| B. | general purpose (GP-PS) |
| C. | expandable |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 9. |
What is the percentage value of elongation at break for polystyrene? |
| A. | 1-3% |
| B. | 100-300% |
| C. | 20-130 % |
| D. | 200-240% |
| Answer» B. 100-300% | |
| 10. |
Which of the following comonomer can copolymerize with styrene to give out a polymer suitable for making ion-exchange resins? |
| A. | vinyl acetate |
| B. | divinyl benzene |
| C. | acrylonitrile |
| D. | butadiene |
| Answer» C. acrylonitrile | |
| 11. |
What is the effect of the outdoor exposure on polystyrene? |
| A. | lowering of melting point |
| B. | crazing and yellowing |
| C. | increased brittleness |
| D. | none of the mentioned |
| Answer» C. increased brittleness | |
| 12. |
Which of the following grade of polystyrene is useful in optical applications? |
| A. | general-purpose (GP-PS) |
| B. | high impact (HIPS) |
| C. | expanded grades |
| D. | none of the mentioned |
| Answer» B. high impact (HIPS) | |
| 13. |
Polystyrene is not a suitable polymer to be used for injection moulding and thermoforming. State true or false. |
| A. | true |
| B. | false |
| Answer» C. | |
| 14. |
What is the approximate density of polystyrene in g/cm3? |
| A. | 0.96 |
| B. | 0.915 |
| C. | 1.054 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 15. |
Which of the following property of polystyrene is improved, when traces of unreacted monomer is removed? |
| A. | melting point |
| B. | brittleness |
| C. | crystallinity |
| D. | none of the mentioned |
| Answer» B. brittleness | |
| 16. |
What kind of polymer is the commercially used polystyrene? |
| A. | syndiotactic |
| B. | isotactic |
| C. | atactic |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 17. |
How many stages do the bulk polymerization of styrene passes through? |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» B. 1 | |
| 18. |
Which of the following can stabilize the vinyl benzene? |
| A. | t-butyl catechol |
| B. | t-butyl hexanol |
| C. | lactone |
| D. | none of the mentioned |
| Answer» B. t-butyl hexanol | |
| 19. |
Which of the following is used as a catalyst for the alkylation of benzene in the process of formation of styrene? |
| A. | AlCl<sub>3</sub> |
| B. | MgO |
| C. | FeO |
| D. | TiCl<sub>4</sub> |
| Answer» B. MgO | |