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 is the correct expression for number average degree of polymerization for the non-linear multi-functional systems? |
| A. | t1/{1-(pf/2)} |
| B. | t(1+p)/{1-(f-1)p} |
| C. | t1-(pf/2) |
| D. | t1/(pf/2) |
| Answer» B. t(1+p)/{1-(f-1)p} | |
| 2. |
At 100% completion of reaction, only gel is present and the distribution breadth, Xw/Xn becomes infinite. State true or false. |
| A. | tTrue |
| B. | tFalse |
| Answer» C. | |
| 3. |
How does the weight distribution vary with increasing conversion and constant trifunctionality? |
| A. | tgets broader |
| B. | tgets narrower |
| C. | tremains constant |
| D. | t none of the mentioned |
| Answer» B. tgets narrower | |
| 4. |
What is true about the branching system involving trifunctional monomers? |
| A. | tweight fraction of monomer lower than other species |
| B. | t weight fraction of bigger species become higher progressively |
| C. | tweight fraction of monomer always larger than other species |
| D. | tnone of the mentioned |
| Answer» D. tnone of the mentioned | |
| 5. |
How does weight fraction distribution vary with increasing functionality at constant conversion? |
| A. | tgets broader |
| B. | t gets narrower |
| C. | t remains constant |
| D. | tnone of the mentioned |
| Answer» B. t gets narrower | |
| 6. |
Which of the following monomer molecule s presence could lead to the formation of cross linking polymer, when hydroxyl caproic acid and carboxyl acid monomers (f>2) are polymerized together? |
| A. | tglycol |
| B. | tethanol |
| C. | tdiamines |
| D. | tnone of the mentioned |
| Answer» B. tethanol | |
| 7. |
Hydroxyacid is allowed to polymerize in the presence of another trifunctional monomer containing carboxylic groups. What kind of structure is formed at the end of the reaction? |
| A. | tlinear |
| B. | tbranched |
| C. | tcross-linked |
| D. | tnone of the mentioned |
| Answer» C. tcross-linked | |
| 8. |
What is the molecular distribution breadth for polymerization reaction of trifunctional monomers, if the conversion is 90%? |
| A. | t0.344 |
| B. | t1.344 |
| C. | t0.33 |
| D. | tnone of the mentioned |
| Answer» C. t0.33 | |