GATE MT 2025 Paper 1 — page 14

Questions 40–42 of 65. Imported answers require review unless explicitly marked reviewed.

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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2025 · Paper 1