MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 monomer pairs forms a copolymer that exhibits excellent chemical resistance and self-extinguishing properties? |
| A. | vinyl chloride + vinylidene chloride |
| B. | vinyl chloride + vinyl acetate |
| C. | vinyl chloride + acrylonitrile |
| D. | none of the mentioned |
| Answer» B. vinyl chloride + vinyl acetate | |
| 2. |
Which of the following compound is used in fire retardant compounds of PVC? |
| A. | dibutyl sebacate |
| B. | dibutyl phthalate |
| C. | barium phenate |
| D. | tricresyl phosphate |
| Answer» E. | |
| 3. |
WHICH_OF_THE_FOLLOWING_COMPOUND_IS_USED_IN_FIRE_RETARDANT_COMPOUNDS_OF_PVC??$ |
| A. | dibutyl sebacate |
| B. | dibutyl phthalate |
| C. | barium phenate |
| D. | tricresyl phosphate |
| Answer» E. | |
| 4. |
Which_of_the_following_monomer_pairs_forms_a_copolymer_that_exhibits_excellent_chemical_resistance_and_self-extinguishing_properties?$ |
| A. | vinyl chloride + vinylidene chloride |
| B. | vinyl chloride + vinyl acetate |
| C. | vinyl chloride + acrylonitrile |
| D. | none of the mentioned |
| Answer» B. vinyl chloride + vinyl acetate | |
| 5. |
Which of the following compounds can process the flexibility applications of PVC? |
| A. | stabilizers |
| B. | lubricants |
| C. | plasticizers |
| D. | coloring matters |
| Answer» D. coloring matters | |
| 6. |
Which among the following comonomer can make the copolymer of vinyl chloride suitable for phonograph records? |
| A. | vinyl acetate |
| B. | vinylidene chloride |
| C. | diethyl fumarate |
| D. | diethyl maleate |
| Answer» B. vinylidene chloride | |
| 7. |
Which of the following property is enhanced when vinyl chloride is copolymerized with 10-20% diethyl fumarate? |
| A. | toughness |
| B. | solubility |
| C. | clarity |
| D. | transparency |
| Answer» B. solubility | |
| 8. |
Which of the following solvent cannot solubilize Poly vinyl chloride into it? |
| A. | cyclohexanone |
| B. | tetra hydrofuran |
| C. | hexane |
| D. | nitrobenzene |
| Answer» D. nitrobenzene | |
| 9. |
What approx. percentage of chlorine is present in the homopolymer of vinyl chloride? |
| A. | 57% |
| B. | 50% |
| C. | 48% |
| D. | 40% |
| Answer» B. 50% | |
| 10. |
Which of the following grades of poly vinyl chloride is unsuitable for insulation purposes? |
| A. | bulk grade |
| B. | suspension grade |
| C. | emulsion grade |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 11. |
Which of the following reaction does not give HCl as a byproduct? |
| A. | oxychlorination of ethylene |
| B. | hydrochlorination of acetylene |
| C. | chlorination of ethylene |
| D. | none of the mentioned |
| Answer» C. chlorination of ethylene | |
| 12. |
At what temperature does acetylene reacts with dry hydrogen chloride in a multi tubular reactor packed with mercuric chloride catalyst, supported over activated carbon, to produce vinyl chloride? |
| A. | 50-60 ᵒC |
| B. | 90-100 ᵒC |
| C. | 150-175 ᵒC |
| D. | 180 ᵒC |
| Answer» C. 150-175 ¬¨‚à묨¬µ‚àö‚â†C | |