MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Corrosion Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Degradation of plastics is due to swelling, loss of mechanical properties, softening, hardening, and spalling. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following is the monomer of Polyvinyl chloride (PVC)? |
| A. | CF<sub>2</sub>=CF<sub>2</sub> |
| B. | CH<sub>2</sub>=CH-Cl |
| C. | COOH-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub> CH<sub>2</sub>COOH |
| D. | C<sub>6</sub>H<sub>5</sub>-CH=CH<sub>2</sub> |
| Answer» C. COOH-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub> CH<sub>2</sub>COOH | |
| 3. |
Which of the following is/are the examples of thermoplastics? |
| A. | Polypropylene |
| B. | Polystyrene |
| C. | Polyvinyl chloride |
| D. | Polypropylene, polystyrene and polyvinyl chloride |
| Answer» E. | |
| 4. |
Which of the following is/are the monomers of nylon (6,6)? |
| A. | Hexamethylenediamine |
| B. | Adipic acid |
| C. | Both Hexamethylenediamine and adipic acid |
| D. | Neither Hexamethylenediamine nor adipic acid |
| Answer» D. Neither Hexamethylenediamine nor adipic acid | |
| 5. |
Which of the following thermoplastics is used for making eye lenses? |
| A. | Polytetrafluoroethylene |
| B. | Polyethylene terephthalate |
| C. | Polymethyl methacrylate |
| D. | Polyvinyl chloride |
| Answer» D. Polyvinyl chloride | |
| 6. |
Which of the following is the chemical name of nylon (6, 6)? |
| A. | Polyethylene terephthalate |
| B. | Hexamethylene adipamide |
| C. | Polytetrafluoroethylene |
| D. | Polyvinyl fluoride |
| Answer» C. Polytetrafluoroethylene | |
| 7. |
Which of the following thermoplastic is corrosion-resistant to all environments up to 550 F? |
| A. | Polyvinyl chloride |
| B. | Polystyrene |
| C. | Teflon |
| D. | Polyethylene |
| Answer» D. Polyethylene | |
| 8. |
What is meant by thermoplastic? |
| A. | It softens on heating and returns to original hardness on cooling |
| B. | It hardens on heating and returns to original hardness on cooling |
| C. | It hardens on heating and retains hardness on cooling |
| D. | It softens on heating and retains hardness on cooling |
| Answer» B. It hardens on heating and returns to original hardness on cooling | |
| 9. |
Which of the following is/are the classification of plastics based on the thermal behavior? |
| A. | Thermoplastics |
| B. | Thermosetting |
| C. | Neither thermoplastics nor thermosetting |
| D. | Thermoplastics and thermosetting |
| Answer» E. | |