Mechanical Engineering
GATE ME topic:engineering-materials PYQs
Build your understanding with focused practice from past exam papers.
How to practice topic:engineering-materials
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 21. Imported answers require independent review unless marked reviewed.
Question 62
Open questionMENAT2 marksNeeds review
A metal has FCC crystal structure with 2.71 g/cm
density and 26.98 g/mol of atomic weight. The Avogadro’s number is 6.023 × 10
. The atomic radius of the metal is ________ nm (rounded off to 2 decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 20
Open questionMEMCQ1 markNeeds review
Among the following surface hardening processes, steel is heated to the lowest temperature in
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 28
Open questionMEMCQ1 markNeeds review
The phases present in pearlite are
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 51
Open questionMENAT2 marksNeeds review
The atomic radius of a hypothetical face-centered cubic (FCC) metal is
nm. The atomic weight of the metal is 24.092 g/mol. Taking Avogadro’s number to be
atoms/mol, the density of the metal is __________ kg/m
.(Answer in integer)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 52
Open questionMENAT2 marksNeeds review
A steel sample with 1.5 wt.% carbon (no other alloy elements present) is slowly cooled from 1100 °C to just below the eutectoid temperature (723 °C). A part of the iron-cementite phase diagram is shown in the figure. The ratio of the pro-eutectoid cementite content to the total cementite content in the microstructure that develops just below the eutectoid temperature is ________. (Rounded off to two decimal places)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 57
Open questionMENAT2 marksNeeds review
Ignoring the small elastic region, the true stress (
) – true strain (
) variation of a material beyond yielding follows the equation
MPa. The engineering ultimate tensile strength value of this material is __________ MPa.(Rounded off to one decimal place)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 27
Open questionMEMSQ1 markNeeds review
Which of the following heat treatment processes is/are used for surface hardening of steels?
Your answerSelect all correct options. You can choose more than one.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 41
Open questionMEMCQ2 marksNeeds review
In Fe-Fe₃C phase diagram, the eutectoid composition is 0.8 weight % of carbon at 725 °C. The maximum solubility of carbon in α-ferrite phase is 0.025 weight % of carbon. A steel sample, having no other alloying element except 0.5 weight % of carbon, is slowly cooled from 1000 °C to room temperature. The fraction of pro-eutectoid α-ferrite in the above steel sample at room temperature is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 4
Open questionMEMCQ1 markNeeds review
The Cast Iron which possesses all the carbon in the combined form as cementite is known as
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 10
Open questionMEMCQ1 markNeeds review
The crystal structure of γ iron (austenite phase) is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer