Explore topic-wise MCQs in Materials Science.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.

1.

A eutectoid steel is slowly cooled from a temperature of 750 C to a temperature just below 727 C. Calculate the percentage of ferrite and cementite.

A. 88.3% and 11.7%
B. 70% and 30 %
C. 85.4% and 14.6%
D. 20% and 20%
Answer» B. 70% and 30 %
Discussion
2.

Finer size pearlite is called _______

A. Troostite
B. Ledeburite
C. Ferrite
D. Sorbite
Answer» E.
Discussion
3.

7.Compositions above 2.1% C is called as _______

A. Ledeburite
B. Ferrite
C. Hyper and Hypoeutectoid steel
D. Cast iron
Answer» E.
Discussion
4.

The eutectoid mixture of ferrite ( ) and cementite (Fe3C) is called __________

A. Ledeburite
B. Pearlite
C. Hyper and hypo eutectoid steel
D. Cast iron
Answer» C. Hyper and hypo eutectoid steel
Discussion
5.

The eutectic mixture of austenite ( ) and cementite (Fe3C) is called __________

A. Ledeburite
B. Pearlite
C. Hyper and hypo eutectoid steel
D. Cast iron
Answer» B. Pearlite
Discussion
6.

What is Eutectoid reaction at 727 C?

A. L (0.53% C) + (0.09% C) (0.17% C)
B. L (4.3% C) (2.1 % C) + Fe<sub>3</sub>C (6.67% C)
C. (0.8 % C) (0.025% C) + Fe<sub>3</sub>C (6.67% C)
D. L (0.53% C) + (0.09% C) (0.8 % C)
Answer» D. L (0.53% C) + (0.09% C) (0.8 % C)
Discussion
7.

What is the Eutectic reaction at 1146 C?

A. L (0.53% C) + (0.09% C) (0.17% C)
B. L (4.3% C) (2.1 % C) + Fe<sub>3</sub>C (6.67% C)
C. (0.8 % C) (0.025% C) + Fe<sub>3</sub>C (6.67% C)
D. L (0.53% C) + (0.09% C) (0.8 % C)
Answer» C. (0.8 % C) (0.025% C) + Fe<sub>3</sub>C (6.67% C)
Discussion
8.

What is the Peritectic reaction at 1495 C?

A. L (0.53% C) + (0.09% C) (0.17% C)
B. L (4.3% C) (2.1 % C) + Fe<sub>3</sub>C (6.67% C)
C. (0.8 % C) (0.025% C) + Fe<sub>3</sub>C (6.67% C)
D. L (0.53% C) + (0.09% C) (0.8 % C)
Answer» B. L (4.3% C) (2.1 % C) + Fe<sub>3</sub>C (6.67% C)
Discussion