GATE MT branch:mt PYQs & Answers — Page 3

Questions 21–30 of 650. Imported answers require independent review unless marked reviewed.

For a regular solution, which one of the following statements is correct? (ΔHₘᵢₓ is the enthalpy of mixing and ΔSₘᵢₓ is the entropy of mixing)

Your answerChoose one option.

Both ΔHₘᵢₓ and ΔSₘᵢₓ are finite

ΔHₘᵢₓ is zero and ΔSₘᵢₓ is finite

ΔHₘᵢₓ is finite and ΔSₘᵢₓ is zero

Both ΔHₘᵢₓ and ΔSₘᵢₓ are zero

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Which one of the following options is correct?

In a binary alloy system, during spinodal decomposition uphill diffusion occurs:

Your answerChoose one option.

From higher to lower concentration and from higher to lower chemical potential

From higher to lower concentration and from lower to higher chemical potential

From lower to higher concentration and from lower to higher chemical potential

From lower to higher concentration and from higher to lower chemical potential

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Which one of the following options is correct?

In Al - 4 wt % Cu alloy during isothermal aging, the correct precipitation sequence is:

Your answerChoose one option.

θ″ → θ′ → θ → GP zone

GP zone → θ → θ′ → θ″

θ → θ′ → θ″ → GP zone

GP zone → θ″ → θ′ → θ

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Which one of the following options is correct?

After cold-working of a metallic specimen, during the recovery stage, its electrical conductivity:

Your answerChoose one option.

Always increases

Always decreases

Can increase or decrease

Remains unaffected

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Which one of the following options is correct?

Red mud is generated in the production of:

Your answerChoose one option.

Aluminium

Iron

Titanium

Copper

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Residual stress present in a material can be determined by which one of the following techniques:

Your answerChoose one option.

X-ray Diffraction (XRD)

Tensile Testing

Thermo-Gravimetric Analysis (TGA)

Optical Microscopy

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Which one of the following options is correct?

In a convective heat transfer for laminar flow over a flat plate, Nusselt number is a function of Reynolds number and Prandtl number. Similarly, in a convective mass transfer for laminar flow over a flat plate, Sherwood number is a function of:

Your answerChoose one option.

Schmidt number and Reynolds number

Weber number and Reynolds number

Schmidt number and Weber number

Weber number and Prandtl number

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Which one of the following options is correct?

For a solid immersed in a fluid, the convective heat transfer coefficient across the solid-fluid interface is NOT dependent on:

Your answerChoose one option.

Solid-fluid interfacial area

Thermal conductivity of solid

Roughness of solid surface

Viscosity of fluid

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Ergun equation is NOT applied in which one of the following unit operations to analyze gas flow behavior:

Your answerChoose one option.

Blast Furnace

Sintering

Roasting

LD Converter

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Choose the correct option(s).

Here ‘A’ is the Helmholtz free energy and ‘G’ is the Gibbs free energy.

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

‘A’ provides a criterion for equilibrium in a system with constant temperature and constant pressure

‘G’ provides a criterion for equilibrium in a system with constant temperature and constant pressure

‘A’ provides a criterion for equilibrium in a system with constant temperature and constant volume

‘G’ provides a criterion for equilibrium in a system with constant temperature and constant volume

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GATE MT branch:mt PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30