MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
How is the polymer formed by polymerization of acrylonitrile obtained in the form of? |
| A. | homogeneous solution |
| B. | suspension |
| C. | precipitate |
| D. | colloids |
| Answer» D. colloids | |
| 2. |
Which of the following properties are not true about polyacrylonitrile? |
| A. | monomer solubility |
| B. | yellowing on heating |
| C. | soluble in dimethyl formamide |
| D. | suffers discoloration on heating |
| Answer» B. yellowing on heating | |
| 3. |
Which of the following mechanism is used in the formation of commercially used polymethyl methacrylate? |
| A. | anionic mechanism |
| B. | cationic mechanism |
| C. | free radical mechanism |
| D. | cannot be said |
| Answer» D. cannot be said | |
| 4. |
HOW_IS_THE_POLYMER_FORMED_BY_POLYMERIZATION_OF_ACRYLONITRILE_OBTAINED_IN_THE_FORM_OF??$ |
| A. | homogeneous solution |
| B. | suspension |
| C. | precipitate |
| D. | colloids |
| Answer» D. colloids | |
| 5. |
WHICH_OF_THE_FOLLOWING_PROPERTIES_ARE_NOT_TRUE_ABOUT_POLYACRYLONITRILE??$ |
| A. | monomer solubility |
| B. | yellowing on heating |
| C. | soluble in dimethyl formamide |
| D. | suffers discoloration on heating |
| Answer» B. yellowing on heating | |
| 6. |
Which of the following monomer can copolymerize with acrylonitrile to improve the dyeability of the acrylic fibre? |
| A. | vinyl acetate |
| B. | methacrylic acid |
| C. | vinyl pyrrolidone |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
Which of the following polyacrylate is used in paints and adhesives formulation? |
| A. | poly (butyl acrylate) |
| B. | poly (methyl acrylate) |
| C. | poly (2-ethylhexyl acrylate) |
| D. | poly (ethyl acrylate) |
| Answer» D. poly (ethyl acrylate) | |
| 8. |
How does the solubility of polyacrylates in oils and hydrocarbons vary with the length of side group attached? |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | increases then decreases |
| Answer» B. decreases | |
| 9. |
For the production of sheets, rods, etc. by bulk polymerization of methylmethacrylate, the complete polymer syrup of high viscosity is poured into the casting cell, just to minimize reaction exotherm and shrinkage. State true or false. |
| A. | true |
| B. | false |
| Answer» C. | |
| 10. |
What is the specialized application of PMMA, keeping in mind its excellent optical clarity and high atmospheric resistance? |
| A. | hard contact lenses |
| B. | construction |
| C. | decoration of appliances |
| D. | insulation wires |
| Answer» B. construction | |
| 11. |
What is the glass transition temperature of the polymer polymethyl methacrylate? |
| A. | 74ᵒ C |
| B. | 105ᵒ C |
| C. | 93ᵒ C |
| D. | 80ᵒ C |
| Answer» C. 93¬¨‚à묨¬µ‚àö‚↠C | |
| 12. |
Which of the following mechanism is used in the formation of commercially used polymethyl methacrylate? |
| A. | anionic mechanism |
| B. | cationic mechanism |
| C. | free radical mechanism |
| D. | cannot be said |
| Answer» D. cannot be said | |
| 13. |
What is the correct structure of monomer of poly methyl methacrylate? |
| A. | CH<sub>2</sub>‚ïêC(CH<sub>3</sub>)‚àíCO‚àíO‚àíCH<sub>3</sub> |
| B. | CH<sub>3</sub>‚àíCO‚àíO‚àíCH<sub>3</sub> |
| C. | CH<sub>3</sub>‚àíCO‚àíO‚àíCH‚ïêCH<sub>2</sub> |
| D. | CH<sub>3</sub>‚àíCO‚àíO‚àíC(CH<sub>3</sub>)‚ïêCH<sub>2</sub> |
| Answer» B. CH<sub>3</sub>‚Äö√Ñ√∂‚àö‚Ć‚àö‚â†CO‚Äö√Ñ√∂‚àö‚Ć‚àö‚â†O‚Äö√Ñ√∂‚àö‚Ć‚àö‚â†CH<sub>3</sub> | |