Explore topic-wise MCQs in Engineering Materials Metallurgy.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.

Bainite in iron-carbon alloys has a ___________ structure.

A. Dendritic
B. Non-lamellar
C. Linear
D. Hexahedral
Answer» C. Linear
Discussion
2.

Hot-quenching of eutectoid steels in austenitic condition results in formation of ___________

A. Pearlite
B. Bainite
C. Ferrite
D. Cementite
Answer» C. Ferrite
Discussion
3.

Rapid quenching of eutectoid steel ___________ transforms the austenite into martensite.

A. At room temperature
B. Below 320oC
C. At 550oC
D. Above 723oC
Answer» E.
Discussion
4.

Isothermal transformations of eutectoid steel between 723oC and 550oC produces __________ microstructure.

A. Pearlite
B. Bainite
C. Ferrite
D. Cementite
Answer» B. Bainite
Discussion
5.

Examination of transformation time after quenching is done ___________

A. At room temperature
B. Below melting point
C. Above eutectoid temperature
D. Above boiling temperature
Answer» B. Below melting point
Discussion
6.

Austenising of samples for TTT diagram is done __________ temperature.

A. At room temperature
B. Below melting point
C. Above eutectoid temperature
D. Above boiling temperature
Answer» D. Above boiling temperature
Discussion
7.

The first step in constructing a TTT diagram involves _________ the sample.

A. Annealing
B. Normalising
C. Quenching
D. Austenising
Answer» E.
Discussion
8.

Which of the following is not an alternative name for the TTT diagram?

A. S curve
B. C curve
C. Adiabatic curve
D. Bain’s curve
Answer» D. Bain’s curve
Discussion
9.

__________ is used to predict quenching reactions in steels.

A. Isothermal transformation diagram
B. Iron-iron carbide equilibrium diagram
C. Continuous cooling transformation diagram
D. Logarithm scale
Answer» B. Iron-iron carbide equilibrium diagram
Discussion
10.

What does CCT diagram stand for?

A. Constant-critical-temperature
B. Constant-cooling-temperature
C. Continuous-cooling-transformation
D. Continuous-creep-transformation
Answer» D. Continuous-creep-transformation
Discussion
11.

Non-equilibrium phases are shown for their time and transformation using _________

A. Fe-Fe3C diagram
B. TTT diagram
C. CCT diagram
D. TTT and CCT diagram
Answer» E.
Discussion
12.

RAPID_QUENCHING_OF_EUTECTOID_STEEL_____________TRANSFORMS_THE_AUSTENITE_INTO_MARTENSITE.?$

A. At room temperature
B. Below 320<sup>o</sup>C
C. At 550<sup>o</sup>C
D. Above 723<sup>o</sup>C
Answer» E.
Discussion
13.

Bainite in iron-carbon alloys has a ___________ structure.$

A. Dendritic
B. Non-lamellar
C. Linear
D. Hexahedral
Answer» C. Linear
Discussion
14.

Hot-quenching of eutectoid steels in austenitic condition results in formation of ___________$

A. Pearlite
B. Bainite
C. Ferrite
D. Cementite
Answer» C. Ferrite
Discussion
15.

Which of the following factors do not affect the critical cooling rate?

A. Chemical composition
B. Hardening temperature
C. Number or nature of grains
D. Purity of steel
Answer» D. Purity of steel
Discussion
16.

Lower bainite is formed at ___________ temperature range.

A. 750-550<sup>o</sup>C
B. 550-350<sup>o</sup>C
C. 350-250<sup>o</sup>C
D. 250-150<sup>o</sup>C
Answer» D. 250-150<sup>o</sup>C
Discussion
17.

Isothermal transformations of eutectoid steel between 723oC and 550oC produces __________ microstructure?

A. Pearlite
B. Bainite
C. Ferrite
D. Cementite
Answer» B. Bainite
Discussion
18.

Examination of transformation time after quenching is done __________?

A. At room temperature
B. Below melting point
C. Above eutectoid temperature
D. Above boiling temperature
Answer» B. Below melting point
Discussion
19.

The CCT or the TTT diagrams are used for _________

A. One steel of specific composition
B. A family of various steels
C. Alloy system of various compositions
D. Combination of all alloys and steels with various compositions
Answer» B. A family of various steels
Discussion