MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How does the crystallinity of an elastomer affect its strength? |
| A. | Increases with increase in crystallinity |
| B. | Increases with decrease in crystallinity |
| C. | Decreases with increase in crystallinity |
| D. | No effect |
| Answer» B. Increases with decrease in crystallinity | |
| 2. |
Which polymeric arrangement does the figure represent? |
| A. | Unvulcanized |
| B. | Vulcanized |
| C. | Stretched vulcanized |
| D. | Stretched unvulcanized |
| Answer» B. Vulcanized | |
| 3. |
Which kind of polymer arrangement does the below diagram represent? |
| A. | Unvulcanized |
| B. | Vulcanized |
| C. | Stretched vulcanized |
| D. | Stretched unvulcanized |
| Answer» D. Stretched unvulcanized | |
| 4. |
What is the thermal conductivity of rubber? |
| A. | 0.04 W/m <sup>o</sup>C |
| B. | 0.16 W/m <sup>o</sup>C |
| C. | 0.64 W/m <sup>o</sup>C |
| D. | 1.12 W/m <sup>o</sup>C |
| Answer» C. 0.64 W/m <sup>o</sup>C | |
| 5. |
How is the hardness of an elastomer measured? |
| A. | Bloom |
| B. | Brinnell hardness test |
| C. | Rockwell hardness test |
| D. | Shore durometer |
| Answer» E. | |
| 6. |
The loss of heat in elastomers due to friction is known as ________ |
| A. | Resilience |
| B. | Hardness |
| C. | Resistivity |
| D. | Hysteresis |
| Answer» E. | |
| 7. |
How does crystallinity of an elastomer affect its strength? |
| A. | Increases with increase in crystallinity |
| B. | Increases with decrease in crystallinity |
| C. | Decreases with increase in crystallinity |
| D. | No effect |
| Answer» B. Increases with decrease in crystallinity | |
| 8. |
Which of the following is not a characteristic of rubber? |
| A. | Non-crystalline |
| B. | Electrical conductivity |
| C. | Chemical resistance |
| D. | Low softening temperature |
| Answer» C. Chemical resistance | |
| 9. |
Plastics and elastomers differ due to their properties of ________ |
| A. | Resistivity |
| B. | Dielectric strength |
| C. | Acoustic insulation |
| D. | Extensibility |
| Answer» E. | |