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!

So, are you ready to put your Refractory and Polymer Technology knowledge to the test? Let's get started with our carefully curated MCQs!

Refractory and Polymer Technology MCQs | Page 18 of 52

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Q171.
Spalling of a refractory means its

a.

softening.

b.

fracture due to uneven expansion at high temperature.

c.

resistancce to compressive loads.

d.

resistance to chemical action of gases and molten fluxes.

Discuss
Answer: (b).fracture due to uneven expansion at high temperature.
Q172.
Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the

a.

washing action of metal.

b.

corrosion by layer of slag.

c.

both (a) & (b).

d.

neither (a) nor (b).

Discuss
Answer: (a).washing action of metal.
Q173.
Pyrometric cone equivalent (PCE) of a refractory is the measure of its

a.

spalling resistance.

b.

fusion point.

c.

resistance to slag penetration.

d.

resistance to carbon monoxide attack.

Discuss
Answer: (b).fusion point.
Q174.
Highest melting (m.p = 3070°C) oxide refractory is

a.

alumina

b.

thoria

c.

zirconia

d.

magnesia

Discuss
Answer: (b).thoria
Q175.
Chrome magnesite brick is not used for lining the

a.

hearth of soaking pits.

b.

bottom hearth of reheating furnace.

c.

coke oven regenerator.

d.

burning zone of limestone rotary kilns.

Discuss
Answer: (c).coke oven regenerator.
Q176.
Which one contains minimum percentage of SiO₂?

a.

Firebrick

b.

Sillimanite

c.

Semi-silica

d.

Aluminous firebrick

Discuss
Answer: (b).Sillimanite
Q177.
Porosity of silica bricks varies from __________ percent.

a.

5 to 10

b.

20 to 30

c.

45 to 60

d.

60 to 75

Discuss
Answer: (b).20 to 30
Q178.
Colour of fireclay bricks is

a.

light buff to reddish buff

b.

yellow

c.

black

d.

none of these

Discuss
Answer: (a).light buff to reddish buff
Q179.
Rate of slag attack on refractories increases with rise in temperature due to the

a.

decreased viscosity of slag.

b.

increased thermal conductivity of brick.

c.

oxidising condition in the furnace.

d.

none of these.

Discuss
Answer: (a).decreased viscosity of slag.
Q180.
Which of the following is not a high alumina refractory material ?

a.

Kyanite

b.

Sillimanite

c.

Diaspore

d.

Periclase

Discuss
Answer: (d).Periclase
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