Metallurgical Engineering Gate Yearwise 



Metallurgical Engineering Gate 2023 Questions with Answer

Ques 53 GATE 2023

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

A

reduced melt oxidation

B

reduced mold erosion

C

enhanced melt oxidation

D

enhanced mold erosion


(a,b) is the correct answer.

Ques 54 GATE 2023

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

A

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

B

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

C

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

D

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


(a) is the correct answer.

Ques 55 GATE 2023

Enthalpy of formation of an A-B regular solution containing 80 atomic percent A is 3.36 kJ⋅mol-1. 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 J⋅mol-1⋅K-1


(1.2) is the correct answer.

Ques 56 GATE 2023

A thin plate is loaded in plane stress condition with
σxx = 110 MPa, σyy = -50 MPa, τxy = -70 MPa.
The maximum principal stress in MPa is _______ (round off to nearest integer).


(143) is the correct answer.

Ques 57 GATE 2023

A chimney as shown in the figure requires to have natural draft (pressure difference between the furnace and the bottom of chimney, P0 - P1) of 1.0133 × 103 Pa.

Given: acceleration due to gravity, g = 9.81 m⋅s-2
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 0.5 kg⋅m-3, the minimum height (h) of the chimney in meters is _______ (round off to nearest integer).


(207) is the correct answer.

Ques 58 GATE 2023

Two circular surfaces A and B with the values of emissivity ε, temperature T, and respective view factors are shown in the figure. Consider heat radiation only between surfaces A and B.

Given: Stefan-Boltzmann constant, σ = 5.67 × 10-8 Wm-2K-4
Net heat flow rate by radiation from surface A in kW is _______ (round off to 1 decimal place).


(2.8) is the correct answer.

Ques 59 GATE 2023

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


(75) is the correct answer.

Ques 60 GATE 2023

Diffraction pattern of a polycrystalline BCC metal is obtained using monochromatic X-rays of wavelength 0.25 nm. If the first peak occurs at Bragg angle (θ) of 30°, then the radius of the metal atom in nm is _______
(round off to 2 decimal places).


(0.11) is the correct answer.

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