Engineering Sciences
GATE XE year:2021 PYQs
Build your understanding with focused practice from past exam papers.
Questions 51–60 of 175. Imported answers require independent review unless marked reviewed.
Question 8
Open questionXE-CMSQ1 markNeeds review
A metal has a melting point of 600 °C. By rapid cooling, liquid metal can be made to solidify either at 500 °C or 400 °C or 300 °C. Critical size of the solid nuclei is
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Open questionXE-CNAT1 markNeeds review
A magnet of mass 50 g has a magnetic moment of 4.2 × 10⁻⁷ A m². The density of the magnet is 7.2 g cm⁻³. The intensity of magnetization in A m⁻¹ is ________ (round off to 3 decimal places)
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Open questionXE-CMCQ2 marksNeeds review
In the context of scanning electron microscopy, match the information in Column I with most appropriate information in Column II.
Column I
(P) Secondary electrons
(Q) Backscattered electrons
(R) Characteristic X-rays
(S) Diffracted backscattered electrons
Column II
(1) Crystallographic orientation of grains
(2) Failure analysis of fractured surfaces
(3) Chemical composition analysis
(4) Distinguishing chemically distinct phases
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Open questionXE-CMCQ2 marksNeeds review
Match the heat treatment process given in Column I with the most suitable outcomes in Column II.
Column I
(P) Quenching
(Q) Annealing
(R) Tempering
(S) Carburizing
Column II
(1) hardens the steel
(2) softens the cold worked steel
(3) toughens the steel
(4) hardens the surface of steel
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Open questionXE-CMCQ2 marksNeeds review
A co-joined cross-ply laminate composite, as shown in figure, is distorted upon heating. What are the resultant shapes of edges XY and YZ?
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Open questionXE-CMSQ2 marksNeeds review
X-ray diffraction peak broadening enables the estimation of
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Open questionXE-CNAT2 marksNeeds review
Fe - 10 atom % C austenite (fcc), having no Fe vacancies, has a lattice parameter of 4 Å. The density of austenite in g cm
is ________ (round off to 2 decimal places)(Given: atomic weight of Fe = 55.8; atomic weight of C = 12.0; Avogadro’s number = 6.023 × 10²³)
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Open questionXE-CNAT2 marksNeeds review
An element transforms from α to β at 773 K and 1 atm pressure with 912 J mol
as enthalpy of transformation. The molar volumes of α and β phases are 7.377 cm
and 7.317 cm
, respectively. Assume that the difference in molar volumes of α and β is independent of pressure. The pressure (in atm) required for α to β transformation to occur at 723 K is ________ (round off to nearest integer)(Given: 1 atm = 1.01325 × 10⁵ Pa)
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Open questionXE-CNAT2 marksNeeds review
A binary A-B alloy has α and β phases at equilibrium. The ratio of weight percentages (wt. %) of α to β is 4. The wt. % of A in α and β phases are 70 and 20, respectively. The wt. % of B in the alloy is ________ (round off to nearest integer)
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Open questionXE-CNAT2 marksNeeds review
During heating, Ti undergoes allotropic transformation from hcp to bcc at 882 °C. The percent volume change accompanying this transformation is ________ (round off to 1 decimal place)
(Given: atomic weight of Ti = 47.9; lattice parameter of bcc Ti = 0.332 nm; density of hcp Ti = 4.51 g cm
; Avogadro’s number = 6.023 × 10²³)Log in to check the answer
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