Material Science Mechanical previous year questions with answer
Ques 1 GATE 2022 SET-1
In the 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
Ques 2 Gate 2021 Set-2
The Cast Iron which possesses all the carbon in the combined form as cementite is known as
Ques 3 Gate 2020 Set-2
Which one of the following statements about a phase diagram is INCORRECT?
Ques 4 GATE 2017 SET-2
The crystal structure of aluminium is
Ques 5 GATE 2017 SET-2
Given the atomic weight of Fe is 56 and that of C is 12, the weight percentage of carbon in cementite (Fe3C) is ________.
6.67 is the correct answer.
Ques 6 GATE 2017 SET-1
In the engineering stress-strain curve for mild steel, the Ultimate Tensile Strength (UTS) refers to
Ques 7 GATE 2016 SET-3
Engineering strain of a mild steel sample is recorded as 0.100%. The true strain is
Ques 8 GATE 2016 SET-2
In the phase diagram shown in the figure, four samples of the same composition are heated to temperatures marked by a, b, c and d. At which temperature will a sample get solutionized the fastest?
Ques 9 GATE 2016 SET-2
In a binary system of A and B, a liquid of 20% A (80% B) is coexisting with a solid of 70% A (30% B). For an overall composition having 40% A, the fraction of solid is
Ques 10 GATE 2016 SET-1
The "Jominy test" is used to find