GATE XE topic:applied-science PYQs & Answers — Page 96

Questions 951–960 of 1772. Imported answers require independent review unless marked reviewed.

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

Your answerChoose one option.

P-3; Q-2; R-1; S-4

P-2; Q-4; R-3; S-1

P-1; Q-2; R-3; S-4

P-1; Q-3; R-4; S-2

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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?

Diagram for Engineering Sciences question 12

Your answerChoose one option.

XY —; YZ ∪

XY ∪; YZ —

XY ∪; YZ ∩

XY ∩; YZ ∪

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X-ray diffraction peak broadening enables the estimation of

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

crystallite size of the material

microstrain in the material

precise lattice parameter

residual macrostress acting on the material

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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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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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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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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)

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Vickers hardness test is performed with an indenter of square-base diamond pyramid having an included angle of 136° between the opposite faces of the pyramid. If the applied load is 10 kg and the average length of diagonals of square indentation is 0.5 mm, the Vickers hardness in kg mm

is ________ (round off to nearest integer)

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The drift mobility of electron in an n-type Si crystal doped with 10

phosphorous atoms is 1350 cm

. The electrical conductivity in Ω

is ________ (round off to nearest integer)

(Given: Intrinsic charge concentration of Si = 1.45 × 10

; Charge of an electron, e = 1.6 × 10

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At 1000 K, the linear thermal expansion coefficients of graphite, parallel and perpendicular to the graphite layers, are 0.8 × 10

and 29 × 10

, respectively. The percentage increase in the volume of graphite when heated from 900 K to 1100 K is ________ (round off to 2 decimal places)

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GATE XE topic:applied-science PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20