GATE MT topic:materials-science PYQs & Answers — Page 11

Questions 101–110 of 650. Imported answers require independent review unless marked reviewed.

For two continuous functions

and

, the relation

describes an exact differential equation if

Your answerChoose one option.

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Consider the phase diagram of a one component system given below.

, and

are the molar volumes of

, and liquid phases, respectively. Which one of the following statements is TRUE? Given: The change in molar enthalpies,

and

, are positive.

Diagram for Metallurgical Engineering question 37

Your answerChoose one option.

and

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Match the steel plant related processes in Column I with the associated information in Column II.

Column I	Column II
P. Corex	1. Melter-gasifier
Q. Electric Arc Furnace	2. Natural gas reformer
R. Midrex	3. Electromagnetic stirrer
S. Continuous Casting	4. Hot heel

Your answerChoose one option.

P – 1, Q – 4, R – 2, S – 3

P – 1, Q – 4, R – 3, S – 2

P – 2, Q – 4, R – 1, S – 3

P – 1, Q – 3, R – 2, S – 4

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Radiative heat flux

at a hot surface at a temperature

can be expressed as

where

is a constant and

is the temperature of the surroundings (temperatures are expressed in K). The function

is given by _____.

Your answerChoose one option.

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Match the phenomena in Column I with the typical observations in Column II.

Column I

P. Dynamic strain aging Q. Recrystalisation R. Bauschinger effect S. Superplasticity

Column II

Grain boundary sliding

Decrease in yield stress with a reversal of loading direction

Decrease in dislocation density

Serrations in stress-strain curve

Your answerChoose one option.

P – 4, Q – 1, R – 2, S – 3

P – 4, Q – 3, R – 2, S – 1

P – 3, Q – 4, R – 2, S – 1

P – 1, Q – 4, R – 2, S – 3

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Which one of the following matrices is orthogonal?

Your answerChoose one option.

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Match the casting defects in Column I with the characteristic features in Column II.

Column I

P. Misrun Q. Expansion scab R. Pin holes S. Hot tearing

Column II

Penetration of liquid metal behind surface layer of sand moulds

Metal solidifies prematurely in the mould and some sections of the casting are not filled

Cracking because of restraint to contraction in certain areas of the casting during solidification and cooling to room temperature

Evolution of gases during solidification resulting in porosity

Your answerChoose one option.

P – 2, Q – 3, R – 4, S – 1

P – 1, Q – 3, R – 2, S – 4

P – 1, Q – 2, R – 4, S – 3

P – 2, Q – 1, R – 4, S – 3

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The following are the activation energies for diffusion of carbon and iron at 773 K in polycrystalline BCC iron:

P = Activation energy for diffusion of carbon in BCC iron through the lattice

Q = Activation energy for diffusion of iron in BCC iron through the lattice

R = Activation energy for diffusion of iron in BCC iron along the grain boundary

Which one of the following statements is CORRECT?

Your answerChoose one option.

R < P < Q

R < Q < P

Q < P < R

P < R < Q

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Front tension is applied during cold rolling of a thin metal sheet. Which of the following statements is/are TRUE?

Your answerSelect all correct options. You can choose more than one.

The neutral point shifts towards the roll entrance.

The roll load is decreased.

The neutral point shifts towards the roll exit.

The rolling load is increased.

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Which of the following statements is/are CORRECT when Ni is added as an alloying element to a low alloy steel?

Your answerSelect all correct options. You can choose more than one.

Hardenability is increased AND the

temperature is lowered.

Hardenability is decreased AND the

temperature is lowered.

Hardenability is increased AND the

temperature is raised.

Hardenability is decreased AND the

temperature is raised.

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GATE MT topic:materials-science PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45