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Chemical Engineering
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Polymer Technology
Comments
Question
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
Options
A. Fibrous
B. Leathery
C. Rubbery
D. Hard
Correct Answer
Leathery
Polymer Technology problems
Search Results
1. Ion exchange resins are made of
Options
A. lucite
B. sulphonated bakelite
C. polystyrene
D. teflon
Show Answer
Scratch Pad
Discuss
Correct Answer: sulphonated bakelite
2. Chromite refractories are used in
Options
A. bottom of soaking pits.
B. between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other.
C. both (a) & (b)
D. neither (a) and (b)
Show Answer
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Discuss
Correct Answer: both (a) & (b)
3. Fireclay bricks are used in the
Options
A. furnaces allowed to cool frequently
B. flues
C. chimney linings
D. all (a), (b) and (c)
Show Answer
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Discuss
Correct Answer: all (a), (b) and (c)
4. Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
Options
A. mortars
B. cements
C. castables
D. none of these
Show Answer
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Discuss
Correct Answer: castables
5. Refractory materials are never used in the construction of
Options
A. segar cones
B. orton cones
C. pressure vessels
D. ovens & retorts
Show Answer
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Discuss
Correct Answer: pressure vessels
6. Polymethyl methacrylate, which is an acrylic resin, is also called
Options
A. thiokol
B. plexiglass or lucite
C. dacron
D. teflon
Show Answer
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Discuss
Correct Answer: plexiglass or lucite
7. Perspex can be used as a substitute of glass. Its monomer is
Options
A. methyl methacrylate
B. DMT
C. butadiene
D. tetrafluroethylene
Show Answer
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Discuss
Correct Answer: methyl methacrylate
8. Low density polythene as compared to high density polythene is
Options
A. harder
B. tougher
C. chemically inert
D. more flexible
Show Answer
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Discuss
Correct Answer: more flexible
9. Which of the following is stretched into fibres?
Options
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite
Show Answer
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Discuss
Correct Answer: Saturated polyester
10. Pick out the correct statement.
Options
A. Plastics are good conductors of heat and electricity.
B. All the polymers are highly crystalline in nature
C. Polymers can be vaporised by heating to a very high temperature.
D. The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
Show Answer
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Discuss
Correct Answer: The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
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