Polymerization, Polymer Blends and Polymeric Composites MCQs

By: Prof. Dr. Fazal Rehman | Last updated: November 27, 2024

1. Cross-linked polymers are swollen with a different monomer, which results in which one?

(A). Mechanical blends
(B). Chemical blends
(C). Latex blends
(D). Solution-cast blends
(E). None of these

Multiple Choice Question Answer: b

2. Polymers are dissolved in a common solvent for giving which one?

(A). Solution-cast blends
(B). Mechanical blends
(C). Latex blends
(D). Chemical blends
(E). None of these

Multiple Choice Question Answer: a

3. Mixing leads to the formation of which one, for amorphous and semi-crystalline polymers?

(A). Chemical blends
(B). Solution-cast blends
(C). Latex blends
(D). Mechanical blends
(E). None of these

Multiple Choice Question Answer: d

4. Which of the following is the physical mixture of two or more polymers that are not linked by covalent bonds?

(A). Polymerisation
(B). Polyblend
(C). Dendrimer
(D). Multi blend
(E). None of these

Multiple Choice Question Answer: b

5. Which of the following is the immiscible blends exhibit?

(A). Excellent mechanical properties
(B). Poor chemical properties
(C). Poor mechanical properties
(D). Intermediate chemical properties
(E). None of these

Multiple Choice Question Answer: c

6. _________ is incorrect.

(A). Between those of individual components, immiscible blends exhibit a single glass transition temperature (Tg) intermediate
(B). Immiscible blend is usually opaque
(C). Miscible blend is usually clear
(D). Characteristics of every component, immiscible blends exhibit separate Tg’s
(E). None of these

Multiple Choice Question Answer: a

7. Which of the following is the blend is said to be synergistic for the mechanical property if the term (I) in the empirical formula?

(A). Zero
(B). Negative
(C). Positive
(D). Imaginary
(E). None of these

Multiple Choice Question Answer: c

8. Which of the following is the blend is said to be additive for the mechanical property if the term (I) is in the empirical formula?

(A). Imaginary
(B). Zero
(C). Negative
(D). Positive
(E). None of these

Multiple Choice Question Answer: b

9. In the water are mixed and coagulated to give which one fine dispersions of polymers?

(A). Mechanical blends
(B). Solution-cast blends
(C). Chemical blends
(D). Latex blends
(E). None of these

Multiple Choice Question Answer: d

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Polymer Classification

10. The polymer does not possess any strength and exists either as liquid resin or friable powder below the threshold degree of polymerization (DP)?

(A). True
(B). False
(E). None of these

Multiple Choice Question Answer: a

11. Which of the following are the small molecules which combine to form a polymer?

(A). Resins
(B). Monomers
(C). Plastic
(D). Blocks
(E). None of these

Multiple Choice Question Answer: b

12. _______ is incorrect?

(A). Polymers are also called macro-molecules due to their small size
(B). Polymers are called resins when in a form ready for further working
(C). In the polymer, the degree of polymerization is the number of monomeric units contained
(D). Polymerization, the chemical process leading to the formation of polymer, is known
(E). None of these

Multiple Choice Question Answer: a

13. Which of the following is the polymer is any substance made up of many repeating units?

(A). Mere
(B). Resins
(C). Plastic
(D). Blocks
(E). None of these

Multiple Choice Question Answer: a

14. ________ is not an example of semi-crystalline polymer.

(A). HDPE
(B). Nylon
(C). Polyesters
(D). LDPE
(E). None of these

Multiple Choice Question Answer: d

15. Which of the following is the functionality of ethylene glycol?

(A). 4
(B). 2
(C). 3
(D). 5
(E). None of these

Multiple Choice Question Answer: b

16. ________ polymer is not classified under the category of configuration.

(A). Atactic
(B). Cross-linked
(C). Syndiotactic
(D). Isotactic
(E). None of these

Multiple Choice Question Answer: b

17. Which of the following is the optimum DP value of cellulose?

(A). 150
(B). 500
(C). 250
(D). 400
(E). None of these

Multiple Choice Question Answer: b

18. Styrene acrylonitrile is an example of which one?

(A). Linear polymer
(B). Homopolymer
(C). Amorphous polymer
(D). Co-polymer
(E). None of these

Multiple Choice Question Answer: d

19. ________ polymer is not classified under the category of end use.

(A). Synthetic
(B). Fibers
(C). Elastomers
(D). Adhesives
(E). None of these

Multiple Choice Question Answer: a

20. _______ is incorrect.

(A). In any solvent, thermosets are generally insoluble
(B). Cross-linked network structure thermosets have 3-D
(C). By condensation polymerisation reactions thermosets are formed
(D). Thermosets stiffen on cooling and soften on heating
(E). None of these

Multiple Choice Question Answer: c

21. _______ is not an example of thermoplastic?

(A). Polyvinyl chloride
(B). Epoxy
(C). Nylon
(D). Polyesters
(E). None of these

Multiple Choice Question Answer: b

22. Which of the following is the weight average molecular weight for PP given its degree of polymerization as 10,000?

(A). 3,00,000 gm/mol
(B). 4,20,000 gm/mol
(C). 6,70,000 gm/mol
(D). 8,40,000 gm/mol
(E). None of these

Multiple Choice Question Answer: b

23. The cryoscopy refers to which one?

(A). Osmotic pressure measurement
(B). Elevation in boiling point measurement
(C). Freezing point depression measurement
(D). Increase in solubility measurement
(E). None of these

Multiple Choice Question Answer: c

24. Higher molecular weight polymers are more heat resistant and tougher.

(A). True
(B). False
(E). None of these

Multiple Choice Question Answer: a

25. __________ is not a property of matrix materials which are modified by adding particulate fillers.

(A). Modification in electrical conductivity
(B). Improved performance at elevated temperature
(C). Decrease in surface hardness
(D). Improved abrasion resistance
(E). None of these

Multiple Choice Question Answer: c

26. _______ is not combine with fiber to give composites.

(A). Non-metals
(B). Metals
(C). Ceramics
(D). Polymers
(E). None of these

Multiple Choice Question Answer: a

27. ____________ is the aspect ratio.

(A). Diameter to length ratio
(B). Length to depth ratio
(C). Length to diameter ratio
(D). Depth to length ratio
(E). None of these

Multiple Choice Question Answer: c

28. The environmental resistance of the composites the matrix phase controls.

(A). True
(B). False
(E). None of these

Multiple Choice Question Answer: a

29. _____ is incorrect.

(A). None of these
(B). By a layer of less dense core material, sandwich panels consist of two stronger outer sheets separated
(C). 2-D sheets that are stacked and subsequently cemented together laminar composites consist of
(D). As the core thickness increases, the stiffness of the sandwich panel increases
(E). Core material should be low corrosion and heavy-weight resistance

Multiple Choice Question Answer: e

30. To the which of core thickness, the flexural stiffness of the sandwich panel is proportional?

(A). Cube
(B). Square
(C). Inverse
(D). Square root
(E). None of these

Multiple Choice Question Answer: a

31. ______ is not an application of a sandwich panel.

(A). Fabrication of wings of aircrafts
(B). Design of ships, boat hulls
(C). Conveyor belts
(D). Fabrication of roofs, floors and walls of buildings
(E). None of these

Multiple Choice Question Answer: c

32. Which of the following is one of the most popular types of core material used?

(A). Metal foam
(B). Glass
(C). Plastic
(D). Honeycomb
(E). None of these

Multiple Choice Question Answer: d

33. ______ is not a characteristic of glass-fiber reinforced composites.

(A). Low density
(B). Low impact resistance
(C). High tensile strength
(D). Excellent chemical and corrosion resistance
(E). None of these

Multiple Choice Question Answer: b

34. Which of the following are the resultant composites when fibers are used as a dispersed phase for the reinforcement of matrices?

(A). Glass-fiber reinforced
(B). Carbon-fiber reinforced
(C). Wood-fiber reinforced
(D). Unidirectional-fiber reinforced
(E). None of these

Multiple Choice Question Answer: a

35. ______ is an application of glass-fiber reinforced composites.

(A). Aircraft parts
(B). Bicycle frames
(C). Chemical pipelines
(D). Boat hulls
(E). None of these

Multiple Choice Question Answer: a

 

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