GATE MT 2021 Paper 1 — page 6

Questions 16–18 of 65. Imported answers require review unless explicitly marked reviewed.

Elements A and B have the same crystal structure. For a dilute solution of B in A, which one of the following is true?

(Given:

– Mixing enthalpy,

– Activity of B and

– Mole fraction of B)

Your answerChoose one option.

, then

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For uniaxial tensile stress-strain behaviour of polycrystalline aluminium, which one of the following statements is FALSE?

Your answerChoose one option.

True stress is always higher than the engineering stress.

At the ultimate tensile stress point on the true stress - strain curve,

Resilience is the area under the elastic region of the engineering stress - strain curve.

Maximum true stress does not correspond to the maximum load.

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Which one of the following is FALSE for creep deformation?

Your answerChoose one option.

The minimum creep rate is obtained in the primary stage (stage I).

Creep resistance decreases with decrease in grain size.

Coble creep occurs via grain boundary diffusion.

Nabarro-Herring creep occurs via lattice diffusion.

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2021 · Paper 1