GATE MT year:2023 PYQs & Answers — Page 6

Questions 51–60 of 65. Imported answers require independent review unless marked reviewed.

A dislocation loop PQRSTU is on the

plane of a cubic single crystal with Burgers vector

. The dislocation segments

and

are parallel to

and

directions, respectively.

Diagram for Metallurgical Engineering question 51

The correct statement(s) is/are

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

Dislocation segment PQ is mixed in character.

Dislocation segment UT is screw in character.

Dislocation segment PU is mixed in character.

Dislocation segment QR is edge in character.

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Compared to top gating, the effect(s) of bottom gating in sand mold casting is/are

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

reduced melt oxidation

reduced mold erosion

enhanced melt oxidation

enhanced mold erosion

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Choose the correct statement(s) in the context of fusion welding of austenitic stainless steel containing about 0.06 wt.% carbon.

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

Corrosion resistance of heat affected zone is poorer than base material.

Corrosion resistance of heat affected zone is superior than fusion zone.

Corrosion resistance of heat affected zone is same as fusion zone.

Corrosion resistance is same for fusion zone, heat affected zone, and base material.

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For the equation

the value of

is __________ (in integer).

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Enthalpy of formation of an A–B regular solution containing 80 atomic percent A is 3.36

. The activity coefficient of A at 500 K for the solution containing 40 atomic percent A is __________ (round off to 1 decimal place).

Given: Universal gas constant, R = 8.314

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A thin plate is loaded in plane stress condition with

The maximum principal stress in

is __________ (round off to nearest integer).

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A chimney as shown in the figure requires to have natural draft (pressure difference between the furnace and the bottom of chimney,

) of

Diagram for Metallurgical Engineering question 57

Given: acceleration due to gravity,

Assume densities of air and flue do not change along the chimney height. Neglect frictional energy loss and kinetic energy difference at the bottom and top of the chimney.

If the density difference between the air and flue is

, the minimum height (

) of the chimney in meters is __________ (round off to nearest integer).

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Two circular surfaces A and B with the values of emissivity

, temperature T, and respective view factors are shown in the figure. Consider heat radiation only between surfaces A and B.

Diagram for Metallurgical Engineering question 58

Given: Stefan-Boltzmann constant,

Net heat flow rate by radiation from surface A in kW is __________ (round off to 1 decimal place).

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Copper ore assaying 10 wt.% Cu is fed to a concentration plant at the rate of 100 tons/h. If the grades of concentrate and tailing are 30 wt.% Cu and 1 wt.% Cu, respectively, the percentage recovery of copper in concentrate is __________ (round off to nearest integer).

Given: 1 ton = 1000 kg

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Diffraction pattern of a polycrystalline BC metal is obtained using monochromatic X-rays of wavelength 0.25 nm. If the first peak occurs at Brag angle (

) of 30°, then the radius of the metal atom in nm is __________ (round off to 2 decimal places).

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GATE MT year:2023 PYQs

Question 51

Question 52

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60