Engineering Materials MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Engineering Materials, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Engineering Materials 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 Engineering Materials mcq questions that explore various aspects of Engineering Materials problems. Each MCQ is crafted to challenge your understanding of Engineering Materials principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Engineering Materials MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Engineering Materials. 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 Engineering Materials knowledge to the test? Let's get started with our carefully curated MCQs!

Engineering Materials MCQs | Page 19 of 29

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Q181.
In spheroidising process, the steel is

a.

heated below the lower critical temperature and then cooled slowly

b.

heated upto the lower critical temperature and then cooled in still air

c.

heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

d.

none of the above

Discuss
Answer: (c).heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C
Q182.
Pearlite is a combination of 87% ferrite and 13% cementite.

a.

Yes

b.

No

c.

Can't say

d.

None of these

Discuss
Answer: (a).Yes
Q183.
The percentage carbon content in wrought iron is about

a.

0.02

b.

0.1

c.

02

d.

0.4

Discuss
Answer: (a).0.02
Q184.
In the lower part of the blast furnace (zone of fusion), the temperature is

a.

400° to 700°C

b.

800°C to 1000°C

c.

1200°C to 1300°C

d.

1500°C to 1700°C

Discuss
Answer: (c).1200°C to 1300°C
Q185.
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

a.

Silicon

b.

Sulphur

c.

Manganese

d.

Phosphorus

Discuss
Answer: (a).Silicon
Q186.
Which of the following statement is wrong?

a.

A steel with 0.8% carbon is wholly pearlite

b.

The amount of cementite increases with the increase in percentage of carbon in iron

c.

A mechanical mixture of 87% cementite and 13% ferrite is called pearlite

d.

The cementite is identified as round particles in the structure

Discuss
Answer: (c).A mechanical mixture of 87% cementite and 13% ferrite is called pearlite
Q187.
Inconel contains

a.

65% nickel, 15% chromium and 20% iron

b.

68% nickel, 29% copper and 3% other constituents

c.

80% nickel and 20% chromium

d.

80% nickel, 14% chromium and 6% iron

Discuss
Answer: (d).80% nickel, 14% chromium and 6% iron
Q188.
In a hardening process, the hypo-eutectoid steel is

a.

heated from 30° C to 50° C above the upper critical temperature and then cooled in still air

b.

heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

c.

heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace

d.

heated below or close to the lower critical temperature and then cooled slowly

Discuss
Answer: (b).heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
Q189.
The alloying element which reduces the formation of iron sulphide in steel is

a.

chromium

b.

nickel

c.

vanadium

d.

manganese

Discuss
Answer: (d).manganese
Q190.
For a steel containing 0.8% carbon

a.

there is no critical point

b.

there is only one critical point

c.

there are two critical points

d.

there can be any number of critical points

Discuss
Answer: (b).there is only one critical point
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