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.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Refractory and Polymer Technology. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Refractory and Polymer Technology MCQs | Page 11 of 52

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Q101.
Fireclay refractories have

a.

low co-efficient of thermal expansion.

b.

poor thermal spalling resistance.

c.

tendency to expand unduly high during firing.

d.

very high cost.

Discuss
Answer: (a).low co-efficient of thermal expansion.
Q102.
Fireclay bricks is not used for lining the

a.

cupola.

b.

gas producer.

c.

bottom of hot metal mixer.

d.

roof of open hearth furnace.

Discuss
Answer: (c).bottom of hot metal mixer.
Q103.
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.

a.

55

b.

70

c.

80

d.

90

Discuss
Answer: (d).90
Q104.
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.

a.

fireclay

b.

silica

c.

dolomite

d.

very low alumina

Discuss
Answer: (b).silica
Q105.
Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to

a.

thermal spalling

b.

slag attack

c.

fusion under load

d.

CO attack

Discuss
Answer: (a).thermal spalling
Q106.
Thermal spalling mainly occurs during __________ of furnaces.

a.

cooling down

b.

warming up

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) & (b)
Q107.
Which is an acidic refractory ?

a.

Magnesite

b.

Dolomite

c.

Fireclay

d.

Chrome magnesite

Discuss
Answer: (c).Fireclay
Q108.
Carborundum used for making crucibles for melting non-ferrous metals is chemically

a.

silicon carbide

b.

silicon nitride

c.

crystalline magnesia

d.

zirconium sulphate

Discuss
Answer: (a).silicon carbide
Q109.
Which of the following impurities reduces the refractoriness of magnesite bricks ?

a.

Al₂O₃

b.

CaO

c.

SiO₂

d.

all (a), (b) & (c)

Discuss
Answer: (d).all (a), (b) & (c)
Q110.
Crushing strength of a refractory

a.

increases with rise in service temperature.

b.

decreases with rise in service temperature.

c.

is unaffected with change in service temperature.

d.

decreases with increase in porosity.

Discuss
Answer: (b).decreases with rise in service temperature.
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