GATE MT year:2025 PYQs & Answers — Page 7

Questions 61–65 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 7 of 7

A single crystal BCC metal with a lattice parameter

is subjected to deformation at a shear strain rate of

If the average mobile dislocation density in the single crystal is

, the average dislocation velocity is _____

(rounded off to two decimal places).

Given: Burgers vector

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A cylindrical specimen is subjected to plastic deformation in tension up to a uniform elongation of 10%. The final cross-sectional area of the gage section is found to be 20 mm

The initial cross-sectional area of the gage section is _____ mm

(rounded off to an integer).

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The reaction represented by

follows first order kinetics. At a given temperature, 20% of the reaction is completed in 223 s.

The time taken to complete 50% of the reaction at the same temperature is _____ s (rounded off to the nearest integer).

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A cylindrical Al alloy billet of 300 mm diameter is hot extruded to produce a cylindrical rod of 75 mm diameter at a constant true strain rate (

) of

. The flow stress (

) of the alloy at the extrusion temperature is given by

Assume the alloy is perfectly plastic and there is no temperature rise during the extrusion process.

The ideal plastic work of deformation per unit volume is _____

(rounded off to one decimal place).

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Two consecutive estimates of the root of a function

obtained using the Newton-Raphson method are

and

, and the value of the function at

is 15.

The numerical value of first derivative of the function evaluated at

is _____ (in integer).

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GATE MT year:2025 PYQs

Question 61

Question 62

Question 63

Question 64

Question 65