MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 does not resemble to EPDM rubbers? |
| A. | thigh density |
| B. | tmoderate tear strength |
| C. | tgood heat stability |
| D. | tgood storage stability |
| Answer» B. tmoderate tear strength | |
| 2. |
What approx proportion of third diene monomer is added to produce EPDM rubber? |
| A. | t9-10% |
| B. | t4-5% |
| C. | t19-20% |
| D. | t12-15% |
| Answer» C. t19-20% | |
| 3. |
How can the curing of halobutyl rubbers be done conveniently? |
| A. | tsulphur cure |
| B. | tamine cure |
| C. | tquininoid cure |
| D. | tall of the mentioned |
| Answer» E. | |
| 4. |
Which of the following is used for vulcanization of butyl rubber to produce vulcanizates with improved heat resistance and aging characteristics? |
| A. | tsulphur |
| B. | toxime and red lead |
| C. | tphenol-formaldehyde resins |
| D. | tcarbon black |
| Answer» D. tcarbon black | |
| 5. |
Polyisobutylene rubbers can be vulcanized easily using conventional curing systems. State true or false. |
| A. | ttrue |
| B. | tfalse |
| Answer» C. | |
| 6. |
What is the polymerization temperature of isobutylene to give high molecular weight polyisobutylene? |
| A. | t80 C |
| B. | t-80 C |
| C. | t25 C |
| D. | t-25 C |
| Answer» C. t25 C | |
| 7. |
Which one of the following conditions does not resemble to hot nitrile rubbers? |
| A. | thigh temperature 25-50 C |
| B. | thigh gel content |
| C. | tlittle gel content |
| D. | tbranched units |
| Answer» B. thigh gel content | |
| 8. |
Which of the following resistances is provided by the presence of chlorine in CR molecules? |
| A. | tresistance to flex cracking |
| B. | tozone resistance |
| C. | tflame resistance |
| D. | tresistance to oxidative aging |
| Answer» D. tresistance to oxidative aging | |