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 5 of 52

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Q41.
Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the

a.

hearth of the blast furnace.

b.

nuclear reactors, missiles & space crafts.

c.

insulation of high temperature furnaces.

d.

roof of electric furnaces.

Discuss
Answer: (b).nuclear reactors, missiles & space crafts.
Q42.
Hot metal runner in blast furnace are lined with __________ bricks.

a.

silica

b.

carborundum

c.

fireclay

d.

magnesite

Discuss
Answer: (c).fireclay
Q43.
Spray test determines the __________ of refractories.

a.

resistance to slag penetration

b.

resistance to CO attack

c.

RUL

d.

permanent linear change

Discuss
Answer: (a).resistance to slag penetration
Q44.
Thermal diffusivity of a refractory brick is high, when its __________ is high.

a.

density

b.

specific heat

c.

thermal conductivity

d.

none of these

Discuss
Answer: (c).thermal conductivity
Q45.
High porosity refractory bricks have

a.

poor resistance to the peneration of molten slag, metal & flue gases.

b.

poor heat conductivity & low strength.

c.

better thermal spalling resistance.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q46.
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
Q47.
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
Q48.
Which is the stable form of silica below 870°C ?

a.

Tridymite

b.

Cristobalite

c.

Quartz

d.

None of these

Discuss
Answer: (c).Quartz
Q49.
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.
Q50.
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.
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