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# Test: Equilibrium Diagrams & Phase Changes - 2

## 10 Questions MCQ Test Engineering Materials | Test: Equilibrium Diagrams & Phase Changes - 2

Description
This mock test of Test: Equilibrium Diagrams & Phase Changes - 2 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 10 Multiple Choice Questions for Mechanical Engineering Test: Equilibrium Diagrams & Phase Changes - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Equilibrium Diagrams & Phase Changes - 2 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Equilibrium Diagrams & Phase Changes - 2 exercise for a better result in the exam. You can find other Test: Equilibrium Diagrams & Phase Changes - 2 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

### Ms for Fe-C system is around

Solution:

Ms temperature: The temperature at which a martensitic transformation starts during cooling after austenitization. This temperature is around 2100C.

QUESTION: 2

### Following is WRONG about a phase diagram:

Solution:

Time dependence phase changes is studied by kinetics of the phase transformations.

QUESTION: 3

### Which of the following is not a Hume-Ruthery condition?

Solution:
QUESTION: 4

Horizontal arrest in a cooling curve represents:

Solution:
QUESTION: 5

Which of the following is not a typical site for nucleation during solid stage transformation?

Solution:
QUESTION: 6

Overall transformation rate changes with temperature as follows:

Solution:
QUESTION: 7

Weight % of carbon in mild steels is

Solution:
QUESTION: 8

Nose of a C-curve represents

Solution:
QUESTION: 9

Diamagnetic materials

Solution:

Gibbs phase rule is given as
P + F = C + 2
Where P = Number of phase
F = Number of degree of freedom
C = Number of components

QUESTION: 10

Hyper eutectoid steels have carbon content

Solution:

One group is named hypoeutectoid steel (carbon content less than 0.8%) and the other is hypereutectoid steel (carbon content more than 0.8%). In hypoeutectoid steel, the equilibrium microstructure at room temperature consists of ferrite and pearlite; this ferrite is called proeutectoid ferrite