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 16 of 52

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Q151.
Magnesite chrome refractories

a.

have better spalling resistance than chrome magnesite refractories.

b.

have very low thermal co-efficient of expansion.

c.

are not at all resistant to the corrosive action of iron oxide.

d.

have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form.

Discuss
Answer: (a).have better spalling resistance than chrome magnesite refractories.
Q152.
Zirconia refractories are not used in

a.

making sheaths for thermocouple.

b.

lining high temperature ceramic kilns.

c.

furnaces subjected to fluctuating temperature.

d.

high frequency induction furnaces in the form of inductors.

Discuss
Answer: (c).furnaces subjected to fluctuating temperature.
Q153.
Carbon refractories

a.

do not burn/oxidise, when exposed to air on heating.

b.

are not attacked by slags, as they are not wetted by melts.

c.

do not resist temperature fluctuations.

d.

have extremely low thermal & electrical conductivities.

Discuss
Answer: (b).are not attacked by slags, as they are not wetted by melts.
Q154.
Magnesite refractories have low resistance to

a.

attack by basic slag.

b.

abrasion.

c.

disintegration on sudden change of temperature.

d.

both (b) and (c).

Discuss
Answer: (d).both (b) and (c).
Q155.
Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves ?

a.

High refractoriness.

b.

High resistance to spalling.

c.

High strength and density.

d.

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

Discuss
Answer: (a).High refractoriness.
Q156.
The maximum linear expansion of silica bricks during firing is about __________ percent.

a.

0.5

b.

1

c.

2

d.

3.5

Discuss
Answer: (d).3.5
Q157.
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.

a.

10

b.

15

c.

20

d.

30

Discuss
Answer: (d).30
Q158.
Porosity of fireclay refractories is __________ percent.

a.

5-10

b.

10-25

c.

25-35

d.

35-50

Discuss
Answer: (b).10-25
Q159.
SiO₂ percentage in firebrick is about

a.

35-40

b.

55-60

c.

80-85

d.

>94

Discuss
Answer: (b).55-60
Q160.
Porosity is induced in insulating refractories by adding

a.

powdered naphthalene.

b.

ammonium chloride/sulphate.

c.

calcium phosphate.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
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