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 the Phase Diagram are given below:
PART - III
1) How many components are present in a binary phase system?
Correct Answer is "B"
There are 2 components in the binary phase system
2) The A point in the following Cu – Ni phase diagram represents
Correct Answer is "C"
Since both Cu and Ni have FCC crystal structure and their atomic radii are comparable and have the same valency (+2) and also electronegativity difference is very less so according to Hume Rothery rule they form a substitutional solid solution.
3) In a binary isomorphous system which of the following is true?
Correct Answer is "C"
In a binary isomorphous system, the two metals are completely miscible in each other in liquid as well as solid form
4) If the number of components is 1, the number of phases is 3 then which of the following equilibrium is it?
Correct Answer is "A"
From Gibbs phase rule, Degree of Freedom(F) = 1-3+2 = 0. So it is invariant equilibrium.
5) In which of the following the alloy is rapidly cooled?
Correct Answer is "D"
In the coring process, the alloy is rapidly cooled, the other 3 processes are heating related.
6) What is the line that defines the solubility limit of A in B and B in A in a Eutectic phase diagram.
Correct Answer is "C"
The Solvus line defines the solubility limit of A in B and B in A in a Eutectic phase diagram.
7) The degree of freedom at the eutectic point is
Correct Answer is "A"
Since the eutectic point is an invariant system so the degree of freedom at the eutectic point is 0.
8) Why Pb-Sn eutectic alloys are used for soldering purposes?
Correct Answer is "D"
The melting point of Pb-Sn eutectic alloys at the eutectic point is minimum and that’s why it is used as soldering material.
9) In a single-component system, the maximum number of phases that can coexist in equilibrium is
Correct Answer is "D"
The maximum no of phases co-exists when the degree of freedom is zero. So from Gibbs phase rule, 0 = 1 – P + 2 or P = 3.
10) The degree of freedom when ice, water, and water vapor co-exist in equilibrium is
Correct Answer is "A"
The degree of freedom when ice, water, and water vapor co-exist in equilibrium is o since it is an invariant case (triple point).
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 - III
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