MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Low-density Polyethylene shows a higher degree of crystallinity than High-density Polyethylene. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Nylon 6,6 have a higher degree of crystallinity than Polyethylene. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The intermolecular bending forces are ___________ in nylon 6,6 because of the ___________ bonding. |
| A. | Stronger, covalent |
| B. | Stronger, H bonding |
| C. | Weaker, ionic |
| D. | Weaker, H bonding |
| Answer» C. Weaker, ionic | |
| 4. |
The degree of crystallinity doesn’t exceed ___________ in polymers. |
| A. | 10% |
| B. | 30% |
| C. | 60% |
| D. | 80% |
| Answer» E. | |
| 5. |
Which of the following property of a polymer decreases with an increase in crystallinity? |
| A. | Tensile strength |
| B. | Impact toughness |
| C. | Stiffness |
| D. | Creep strength |
| Answer» C. Stiffness | |
| 6. |
Which of the following polymer shows maximum strength? |
| A. | PE |
| B. | PP |
| C. | PVC |
| D. | PS |
| Answer» E. | |
| 7. |
What doesn’t favor the strengthening of polymers? |
| A. | Addition of glass fibers |
| B. | Addition of polar groups in the chain |
| C. | Addition of plasticizers |
| D. | Addition of bulky side groups in the chain |
| Answer» D. Addition of bulky side groups in the chain | |
| 8. |
THE_DEGREE_OF_CRYSTALLINITY_DOESN‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•T_EXCEED_____________IN_POLYMERS.?$# |
| A. | 10% |
| B. | 30% |
| C. | 60% |
| D. | 80% |
| Answer» E. | |
| 9. |
Nylon 6,6 have a higher degree of crystallinity than Polyethylene.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The_intermolecular_bending_forces_are_____________in_nylon_6,6_because_of_the_____________bonding.$ |
| A. | Stronger, covalent |
| B. | Stronger, H bonding |
| C. | Weaker, ionic |
| D. | Weaker, H bonding |
| Answer» C. Weaker, ionic | |
| 11. |
Low_density_PE_shows_a_higher_degree_of_crystallinity_than_HDPE. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Crystallinity results in increased __________? |
| A. | Tensile strength |
| B. | Impact toughness |
| C. | Stiffness |
| D. | Creep strength |
| Answer» C. Stiffness | |
| 13. |
Which one polymer shows maximum strength among all? |
| A. | PE |
| B. | PP |
| C. | PVC |
| D. | PS |
| Answer» E. | |
| 14. |
Strengthening increases with ____________ in polymers. |
| A. | Increase in crystallinity |
| B. | Decreases in molecular weight |
| C. | Decrease in bulky groups |
| D. | Increase copolymerization |
| Answer» B. Decreases in molecular weight | |
| 15. |
What favors strengthening by crystallinity? |
| A. | Trans type structure |
| B. | Cross linking |
| C. | Branching |
| D. | Copolymerization |
| Answer» B. Cross linking | |
| 16. |
What is the effect of increasing molecular weight on melting temperature of polymer? |
| A. | Increases linearly |
| B. | Increases non-linearly |
| C. | Decreases exponentially |
| D. | Decreases linearly |
| Answer» B. Increases non-linearly | |
| 17. |
What doesn’t favor the strengthening of polymers?$ |
| A. | Addition of glass fibers |
| B. | Addition of polar groups in the chain |
| C. | Addition of plasticizers |
| D. | Addition of bulky side groups in the chain |
| Answer» D. Addition of bulky side groups in the chain | |
| 18. |
____________ possess strong intermolecular bonding. |
| A. | Thermoplastic |
| B. | Elastomer |
| C. | Liquid resin |
| D. | Thermosetting plastic |
| Answer» E. | |
| 19. |
___________ increases with increasing molecular weight of polymer. |
| A. | Degree of entanglement |
| B. | Flexibility |
| C. | Cracking |
| D. | Creep |
| Answer» B. Flexibility | |