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Concrete Technology
1000 Polymer Engineering
Quiz 2
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Q.1
What is the effect of polymer transfer on the polymer product formed by radical polymerization?
a) becomes less resistant to foreign agents
b) becomes less crystallizable
c) becomes mechanically weak
d) all of the mentioned
Q.2
Which of the following is the important commercial use of polyvinyl butyral?
a) decorative laminates
b) film forming technology
c) safety glass interlayer
d) textile and paper treatment
Q.3
Which of the following types of polymerization is used to produce Polychloroprene commercially?
a) emulsion polymerization
b) solution polymerization
c) bulk polymerization
d) all of the mentioned
Q.4
Which of the following additives are used in the least amount with polymer in general?
a) cross-linking agents
b) fillers
c) lubricants
d) plasticizers
Q.5
How the viscosity of aromatic polyamide solutions does vary with the increase in volume fraction of polymer formed?
a) decreases always
b) first decreases then increases
c) first increases then decreases
d) increases always
Q.6
Which of the following kind of polymer has the highest percentage in polypropylene?
a) syndiotactic
b) isotactic
c) atactic
d) all of the mentioned
Q.7
How does degree of polymerization affected with increase in temperature of cationic polymerization reaction?
a) cannot be determined
b) increases
c) decreases
d) no change
Q.8
Which of the following compounds is used to control the polymer chain length in emulsion polymerization?
a) gelatin
b) cetyl alcohol
c) buffer solutions
d) dodecyl mercaptan
Q.9
Where is the copolymer equation of binary copolymerization not applicable?
a) cationic systems
b) anionic systems
c) free radical systems
d) none of the mentioned
Q.10
Which of the following cannot affect the average lifetime of a radical in a photo-initiated polymerization?
a) frequency of light radiations
b) intensity of light radiations
c) rate of polymerization, Rp
d) none of the mentioned
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