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 6 of 52

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Q51.
Flexible plastic pipes are made of

a.

high density polyethylene (HDPE).

b.

low density polyethylene (LDPE).

c.

polypropylene.

d.

unsaturated polyester.

Discuss
Answer: (b).low density polyethylene (LDPE).
Q52.
Vacuum steel degassing units are lined with

a.

silica bricks

b.

low duty firebricks

c.

high alumina bricks

d.

graphite blocks

Discuss
Answer: (c).high alumina bricks
Q53.
Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.

a.

1520

b.

1630

c.

1670

d.

1730

Discuss
Answer: (d).1730
Q54.
Which is the stable form of silica below 870°C ?

a.

Tridymite

b.

Cristobalite

c.

Quartz

d.

None of these

Discuss
Answer: (c).Quartz
Q55.
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

a.

spalling resistance.

b.

refractoriness.

c.

refractoriness under load (RUL).

d.

none of these.

Discuss
Answer: (a).spalling resistance.
Q56.
Magnesite bricks are used in those parts of furnaces, which are

a.

subjected to temperature fluctuation.

b.

required to resist corrosive basic slag.

c.

subjected to high load.

d.

none of these.

Discuss
Answer: (b).required to resist corrosive basic slag.
Q57.
Which is not a basic refractory ?

a.

Chrome magnesite

b.

Magnesite

c.

Dolomite

d.

Silicon carbide

Discuss
Answer: (d).Silicon carbide
Q58.
Thoria

a.

has high fusion temperature (> 3000°C) but poor resistance to thermal shock.

b.

has high resistance to basic slags.

c.

which is expensive & radioactive, is used in crucibles for melting high purity metals.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q59.
Which property of refractories is the most important for top section of the blast furnace?

a.

Resistance to abrasion.

b.

Resistance to slag peneration.

c.

Stability of volume at high temperature.

d.

Resistance to corrosion by slag.

Discuss
Answer: (a).Resistance to abrasion.
Q60.
Which one expands on heating ?

a.

Silica bricks

b.

Fireclay bricks

c.

Both (a) & (b)

d.

Neither (a) nor (b)

Discuss
Answer: (a).Silica bricks
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