Phase Diagram MCQs | Part - VIII | Material Science MCQs

This set of Engineering Materials Science "Multiple Choice Questions & Answers" are based on "PHASE DIAGRAM" 

 

PHASE DIAGRAM

Multiple Choice Questions (MCQ)

Hello reader, here you can find some MCQ with answers. But before reading this I will suggest you take a practice test on these questions given below. so you can understand your strength on this topic.

Click here to go Practice Test section on this topic namely Phase Diagram.

But if you want to read this topic first and then practice it then read it carefully.  The Multiple Choice Questions (MCQ) based on Phase Diagram are given below:

PART - VIII

1) The melting point of pure iron is?

A. 1147°C

B. 1493°C

C. 1538°C

D. 1800°C

Correct Answer is "C"

The melting point of pure iron is 1538°C

2) The BCC structure of Fe-C solid solution is known as

A. Austenite

B. Ferrite

C. Cementite

D. Pearlite

Correct Answer is "B"

The BCC structure of the Fe-C solid solution is known as Ferrite.

3) The degrees of freedom, when FCC iron and BCC iron co-exist in equilibrium is

A. 0

B. 1

C. -1

D. 2

Correct Answer is "B"

The degrees of freedom, when FCC iron and BCC iron co-exist in equilibrium is 2-2+1 =1

4) Which of the following is not applicable to α iron?

A. Magnetic

B. Soft

C. Brittle

D. Can be cold worked

Correct Answer is "C"

α iron is soft, magnetic up to 768°C, ductile, and can be cold worked

5) Match the invariant reaction given in Column – I with the carbon wt% at this point given in column – II for Fe – C phase diagram.

COLUMN-I	COLUMN-II
P. Eutectic	i. 0.18
Q. Peritectic	ii. 0.022
R. Eutectoid	iii. 4.3
S. Monotectic	iv. 0.76
	v. 0.51

A. P - ii, Q - i, R - iii, S – v

B. P - iv, Q - iii, R - v, S - i

C. P - iii, Q - i, R - ii, S - v

D. P - iii, Q - i, R – iv, S – v

Correct Answer is "D"

COLUMN-I	COLUMN-II
P. Eutectic	iii. 4.3
Q. Peritectic	i. 0.18
R. Eutectoid	iv. 0.76
S. Monotectic	v. 0.51

6) Match the invariant reaction given in Column – I with their symbolic equation in the cooling direction given in Column - II.

COLUMN-I	COLUMN-II
P. Eutectic	i. L + α → β
Q. Peritectic	ii. α + β → γ
R. Eutectoid	iii. L1 → L2+ α
S. Monotectic	iv. L → α + β
	v. α → β + γ

A. P - ii, Q - i, R - iii, S – v

B. P - iv, Q - i, R - v, S - iii

C. P - iv, Q - i, R - ii, S - v

D. P - iv, Q - i, R – iii, S – ii

Correct Answer is "B"

COLUMN-I	COLUMN-II
P. Eutectic	iv. L → α + β
Q. Peritectic	i. L + α → β
R. Eutectoid	v. α → β + γ
S. Monotectic	iii. L1 → L2+ α

7) Which of the following is true for austenite?

A. Nonmagnetic

B. Has a BCC structure

C. Stable below 727°C

D. Maximum Carbon content at 727°C is 2.1

Correct Answer is "A"

Austenite has an FCC structure, Stable above 727°C, and below 1493°C, maximum Carbon content at 727°C is 0.76 and is nonmagnetic.

8) Match the Fe – C alloy name given in Column – I with their Carbon percentage given in Column - II.

COLUMN-I	COLUMN-II
P. Cast Iron	i. 0.05 – 0.3%
Q. Mild Steel	ii. 0.3 – 0.6%
R. Medium carbon steel	iii. 0.6 – 1.5%
S. Pig Iron	iv. 1.7 – 3.5%
	v. 3.5 – 4.5%

A. P - ii, Q - i, R - iii, S – v

B. P - iv, Q - i, R - v, S - iii

C. P - iv, Q - i, R - ii, S - v

D. P - iv, Q - i, R – iii, S – ii

Correct Answer is "C"

COLUMN-I	COLUMN-II
P. Metals	iv. 1.7 – 3.5%
Q. Mild Steel	i. 0.05 – 0.3%
R. Medium carbon steel	ii. 0.3 – 0.6%
S. Pig Iron	v. 3.5 – 4.5%

9) Which of the following shows hypereutectoid microstructure?

A. 



Image may be subject to copyright

B. 



Image may be subject to copyright

C. 



Image may be subject to copyright

D. 



Image may be subject to copyright

Correct Answer is "D"

For hypereutectoid microstructure, there must be one pro eutectoid Fe₃C phase along with the eutectoid mix phase

10) Which of the following shows the eutectoid microstructure?

A. 



Image may be subject to copyright

B. 



Image may be subject to copyright

C. 



Image may be subject to copyright

D. 



Image may be subject to copyright

Correct Answer is "B"

For eutectoid microstructure there no pro eutectoid α or Fe₃C phase preset there only a mixture of eutectoid α + Fe₃C phase present

Do you read all the questions and answers given above carefully? let's make a practice on all the questions given above.
Go to:  Practice Test on Phase Diagram (MCQ) PART - VIII

Suggested Topic:

Phase Diagram Multiple Choice Questions (MCQ) & Answers Part - VII

Phase Diagram Multiple Choice Questions (MCQ) & Answers All Parts

Phase Diagram Multiple Select Questions (MSQ) & Answers All Parts

Phase Diagram All Formulas

Phase Diagram Numerical Problems Questions & Answers All Parts

Disclaimer:

Some of the questions given above may be similar to questions from some books and other online available sources but the answers to all the questions are genuinely made by admin@materialscienceonline.

Let me know if this post is helpful or not?
I am trying my best to gather more and more objective type questions on this site for your best practice. If you have any queries about any questions given above then don't hesitate to comment below or you can also directly contact me through  materialscienceonline4u@gmail.com.

MaterialScienceOnline is made to provide you all types of chapter-wise objective (Multiple Choice, Multiple Select and Numerical) questions, answers, and explanations as well as a chapter-wise various practice tests or quiz to catalyst your competitive exam preparation. Various top-rated Material Science and Engineering pdf books are also available here.

Thank you for visiting this site. If you think this post is helpful then share this post as well as this website with your friends.