Refractory and Polymer Technology MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Refractory and Polymer Technology, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Refractory and Polymer Technology MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Refractory and Polymer Technology mcq questions that explore various aspects of Refractory and Polymer Technology problems. Each MCQ is crafted to challenge your understanding of Refractory and Polymer Technology principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Refractory and Polymer Technology MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

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Refractory and Polymer Technology MCQs | Page 36 of 52

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Q351.
Nylon-66 compared to nylon-6 has

a.

lower melting point.

b.

more abrasion resistant properties.

c.

higher hardness.

d.

all (a), (b) and (c).

Discuss
Answer: (c).higher hardness.
Q352.
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

a.

improving the stretchability

b.

dyeing/colouring

c.

detergent solution washing

d.

glycol soaking

Discuss
Answer: (c).detergent solution washing
Q353.
Which of the following is generally not drawn into fibre ?

a.

Polyamide

b.

Unsaturated polyesters

c.

Saturated polyesters

d.

Polyacrylonitrile

Discuss
Answer: (b).Unsaturated polyesters
Q354.
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.

a.

-20 to 25

b.

50 to 75

c.

100 to 150

d.

250-280

Discuss
Answer: (d).250-280
Q355.
Which of the following is not a natural polymer ?

a.

Nucleic acids e.g. RNA and DNA

b.

Polysaccharides

c.

Polyisoprene

d.

Polyurethane

Discuss
Answer: (d).Polyurethane
Q356.
In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.

a.

viscose rayon

b.

acrylic

c.

polyvinyl acetate

d.

saturated polyester

Discuss
Answer: (d).saturated polyester
Q357.
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

a.

acrylic

b.

polyester

c.

nylon 6:6

d.

polypropylene

Discuss
Answer: (a).acrylic
Q358.
Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ?

a.

Perspex

b.

Lucite

c.

Plexiglass

d.

Teflon

Discuss
Answer: (d).Teflon
Q359.
Density of low density polythene is about __________ gm/c.c.

a.

0.38

b.

0.56

c.

0.81

d.

0.91

Discuss
Answer: (d).0.91
Q360.
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

a.

terylene

b.

polybutadiene

c.

PVC

d.

polypropylene

Discuss
Answer: (a).terylene
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