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MCQs

Total Questions : 515 | Page 47 of 52 pages
Question 461. Nylon 6 as compared to nylon 6, 6 has lower
  1.    abrasion resistance.
  2.    thermal stability.
  3.    adhesion to rubber.
  4.    hardness.
 Discuss Question
Answer: Option A. -> abrasion resistance.
Answer: (a).abrasion resistance.
Question 462. Ion exchange resins are made of
  1.    lucite
  2.    sulphonated bakelite
  3.    polystyrene
  4.    teflon
 Discuss Question
Answer: Option B. -> sulphonated bakelite
Answer: (b).sulphonated bakelite
Question 463. Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
  1.    Phosphorous
  2.    Carbon black
  3.    Pine oil
  4.    Rosin
 Discuss Question
Answer: Option B. -> Carbon black
Answer: (b).Carbon black
Question 464. __________ is an addition polymer
  1.    Nylon
  2.    Bakelite
  3.    Polythene
  4.    none of these
 Discuss Question
Answer: Option C. -> Polythene
Answer: (c).Polythene
Question 465. Branched chair polymers as compared to linear polymers have
  1.    higher melting point.
  2.    higher tensile strength.
  3.    lower density.
  4.    none of these.
 Discuss Question
Answer: Option C. -> lower density.
Answer: (c).lower density.
Question 466. __________ fibres are made of polyamides.
  1.    Dacron
  2.    Nylon
  3.    Rayon
  4.    Orion
 Discuss Question
Answer: Option B. -> Nylon
Answer: (b).Nylon
Question 467. Flexible foam (for mattresses) are usually made of
  1.    PVC
  2.    silicone rubber
  3.    polyurethanes
  4.    polyamides
 Discuss Question
Answer: Option C. -> polyurethanes
Answer: (c).polyurethanes
Question 468. Pick out the wrong statement.
  1.    Linear polymers are formed from bifunctional groups only and are normally thermoplastic.
  2.    Cross-linked branched chain polymers are either elastometric or thermosetting.
  3.    Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point.
  4.    Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.
 Discuss Question
Answer: Option D. -> Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.
Answer: (d).Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.
Question 469. Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
  1.    -20
  2.    50
  3.    250
  4.    500
 Discuss Question
Answer: Option B. -> 50
Answer: (b).50
Question 470. Which of the following is stretched into fibres ?
  1.    Saturated polyester
  2.    Unsaturated polyester
  3.    Isoprene
  4.    Bakelite
 Discuss Question
Answer: Option A. -> Saturated polyester
Answer: (a).Saturated polyester

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