Phase Transformation MSQs | Part - II | Material Science MSQs

This set of Engineering Materials Science "Multiple Select Questions & Answers" are based on "PHASE TRANSFORMATION" 

 

PHASE TRANSFORMATION

Multiple Select Questions (MSQ)

Hello reader, here you can find some MSQ 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 Transformation.

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

PART - II

1) Which of the following is present in pearlite?

A. Spherodite

B. Bainite

C. Cementite

D. Ferrite

Correct Answer is "C", "D"

Ferrite and Cementite are present in pearlite

2) Which of the following is true?

A. Fine pearlite is less ductile than coarse pearlite

B. Fine pearlite is harder than coarse pearlite

C. Fine pearlite is softer than coarse pearlite

D. Toughness of steel decreases with increase in carbon percentage

Correct Answer is "A", "B", "D"

Fine pearlite is less ductile and harder than coarse pearlite. Toughness of steel decreases with the increase in carbon percentage.

3) During pearlitic transformations

A. new phases form

B. crystal structures change

C. compositions of phases change

D. there is no diffusion

Correct Answer is "A", "B", "C"

During pearlitic transformations new phases form, crystal structures change & compositions of phases change

4) Which of the following impurity is responsible for temper embrittlement?

A. Sn

B. Cr

C. P

D. Sb

Correct Answer is "A", "B", "C", "D"

Impurity responsible for temper embrittlement are manganese, nickel, chromium, antimony, phosphorus, arsenic, and tin

5) For steel, which one of the following properties can be enhanced upon annealing?

A. Hardness

B. Toughness

C. Tensile strength

D. Ductility

Correct Answer is "B", "'D"

For steel, toughness and ductility can be enhanced upon annealing.

6) Annealing is carried out to

A. Increase hardness

B. Relief stresses

C. Produce a specific microstructure.

D. Increase ductility and toughness

Correct Answer is "B", "C","D"

Annealing is carried out to relief stresses, Increase ductility and toughness, decrease hardness and produce a specific microstructure

7) Which of the following is not correct for normalizing process?

A. Normalizing is used to improve properties of steel castings instead of hardening and tempering.

B. Normalizing produces heterogenized structure.

C. In comparison to fully annealed material, normalizing produces weaker material.

D. Normalizing refines the grains.

Correct Answer is "B", "C"

Normalizing is a process which is used to improve properties of steel castings instead of hardening and tempering.
In comparison to fully annealed material, normalizing produces harder material.
Normalizing produces homogenized structure.
Normalizing refines the grains.

8) Which of the following is not correct for Austempering?

A. It is suitable for material with large thickness

B. No reheating is required

C. Austempered steel has very poor shock resistance .

D. It produces Bainite microstructure

Correct Answer is "A", "C"

During Austempering which produces Bainite microstructure no reheating is required as in tempering and it suitable for material with small thickness.
Austempered steel has very high shock resistance .

9) Which of the following Statement/s are correct

A. Higher is the under cooling higher is the r*

B. Heterogeneous nucleation is favoured over homogeneous nucleation for smaller contact angle.

C. Volume of homogeneous nucleus is always smaller than that of heterogeneous nucleus.

D. ∆G* decreases as T increases.

Correct Answer is "B"

Higher is the under cooling lower is the r*.
Heterogeneous nucleation is favoured over homogeneous nucleation for smaller contact angle.
Volume of homogeneous nucleus is always equal to that of heterogeneous nucleus only the difference in free energy of activation.
∆G* decreases as T decreases.

10) Which of the following is present in spherodite?

A. Ferrite

B. Pearlite

C. Bainite

D. Ledeburite

Correct Answer is "A"

Ferrite and cementite are present in spherodite

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 Transformation (MSQ) Part - II

Suggested Topics:

Phase Transformation Multiple Select Questions (MSQ) & Answers Part - I

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

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

Phase Transformation Numerical Problems Questions & Answers All Parts

Phase Transformation Formulas

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