Discussion
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- Question
Low density polythene as compared to high density polythene is
Options- A. harder
- B. tougher
- C. chemically inert
- D. more flexible
- Correct Answer
- more flexible
- 1. Perspex can be used as a substitute of glass. Its monomer is
Options- A. methyl methacrylate
- B. DMT
- C. butadiene
- D. tetrafluroethylene Discuss
- 2. Polymethyl methacrylate, which is an acrylic resin, is also called
Options- A. thiokol
- B. plexiglass or lucite
- C. dacron
- D. teflon Discuss
- 3. __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
Options- A. Fibrous
- B. Leathery
- C. Rubbery
- D. Hard Discuss
- 4. Ion exchange resins are made of
Options- A. lucite
- B. sulphonated bakelite
- C. polystyrene
- D. teflon Discuss
- 5. 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) Discuss
- 6. Which of the following is stretched into fibres?
Options- A. Saturated polyester
- B. Unsaturated polyester
- C. Isoprene
- D. Bakelite Discuss
- 7. 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. Discuss
- 8. Viscosity of a polymer solution or melt
Options- A. decreases with increase in molecular weight.
- B. decreases with increase in temperature.
- C. increases with increase in temperature.
- D. does not vary with temperature rise. Discuss
- 9. __________ is an addition polymer
Options- A. Nylon
- B. Bakelite
- C. Polythene
- D. none of these Discuss
- 10. Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are
Options- A. 5°C and 1 kgf/cm2.
- B. - 20°C and 1 kgf/cm2.
- C. 0°C and 1 kgf/cm2.
- D. 0°C and 3 kgf/cm2. Discuss
Polymer Technology problems
Search Results
Correct Answer: methyl methacrylate
Correct Answer: plexiglass or lucite
Correct Answer: Leathery
Correct Answer: sulphonated bakelite
Correct Answer: both (a) & (b)
Correct Answer: Saturated polyester
Correct Answer: The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation.
Correct Answer: increases with increase in temperature.
Correct Answer: Polythene
Correct Answer: 5°C and 1 kgf/cm2.
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