Polymer Technology(Chemical Engineering ) Questions and Answers

Question 1. Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to
  1.    Protect rubber goods from attack by oxygen & ozone present in the atmosphere
  2.    Reduce its viscosity to permit easier processing
  3.    Reduce the time of vulcanisation and quantity of vulcanising agent
  4.    Increase its viscosity
Explanation:-
Answer: Option B. -> Reduce its viscosity to permit easier processing
Question 2. Amino resins are used in paper treatment to improve its
  1.    Wet tear and bursting strength
  2.    Folding endurance
  3.    Wet rub resistance
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Question 3. Phthalic anhydride is used
  1.    In making PVC
  2.    As plasticisers
  3.    In insecticides manufacture
  4.    For making nylon-6
Explanation:-
Answer: Option B. -> As plasticisers
Question 4. Phenol formaldehyde
  1.    Employs addition polymerisation
  2.    Employs condensation polymerisation
  3.    Is a monomer
  4.    Is an abrasive material
Explanation:-
Answer: Option B. -> Employs condensation polymerisation
Question 5. Commercial production of polypropylene employs __________ polymerisation.
  1.    Emulsion
  2.    Suspension
  3.    Solution
  4.    Bulk
Explanation:-
Answer: Option C. -> Solution
Question 6. __________ scrap can be recycled & reutilised.
  1.    Bakelite
  2.    Epoxy resin
  3.    Polythene
  4.    None of these
Explanation:-
Answer: Option C. -> Polythene
Question 7. Condensation polymerisation of __________ produces bakelite.
  1.    Propylene
  2.    Phenol & formaldehyde
  3.    Phenol & acetaldehyde
  4.    Urea & formaldehyde
Explanation:-
Answer: Option B. -> Phenol & formaldehyde
Question 8. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
  1.    Improving the stretchability
  2.    Dyeing/colouring
  3.    Detergent solution washing
  4.    Glycol soaking
Explanation:-
Answer: Option C. -> Detergent solution washing
Question 9. Polymethyl methacrylate, which is an acrylic resin, is also called
  1.    Thiokol
  2.    Plexiglass or lucite
  3.    Dacron
  4.    Teflon
Explanation:-
Answer: Option B. -> Plexiglass or lucite
Question 10. Lavatory cisterns are normally made of
  1.    Expanded polystyrene
  2.    Saturated polyester
  3.    Perspex
  4.    PVC
Explanation:-
Answer: Option A. -> Expanded polystyrene
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