Metallurgical Engineering Gate Yearwise 



Metallurgical Engineering Gate 2022 Questions with Answer

Ques 27 GATE 2022

With increase in carbon content (up to 2 mass%) in Fe-C alloy, which one of the following statements is correct with respect to the lattice parameters (c and a) of BCT martensite?

A

Both c and a increase

B

c increases but a decreases

C

c decreases but a increases

D

Both c and a decrease


(b) is the correct answer.

Ques 28 GATE 2022

With reference to the stress intensity factor, find the correct match of nomenclature (Column A) with the mode of deformation applied to the crack (Column B).

A

P-Z, Q-Y, R-X

B

P-Z, Q-X, R-Y

C

P-Y, Q-X, R-Z

D

P-Y, Q-Z, R-X


(b) is the correct answer.

Ques 29 GATE 2022

Identify the correct statement(s) with respect to the role of nickel as an alloying element in steels.

A

It increases the Ms temperature.

B

It is an austenite stabilizer.

C

It decreases the Ms temperature.

D

It is a carbide former.


(b,c) is the correct answer.

Ques 30 GATE 2022

While designing a material for high temperature application, which of the following characteristic(s)/attribute(s) is (are) desirable for achieving better creep resistance?

A

Fine grain size

B

FCC crystal structure

C

High melting point

D

Cold worked microstructure


(b,c) is the correct answer.

Ques 31 GATE 2022

Given the strain rate (ε̇), dislocation density (ρ), dislocation velocity (v), which of the following relationship(s) is (are) correct? Assume that Orowan equation for plastic flow due to the dislocation movement is obeyed.

A

ε̇∝v2

B

ε̇∝v

C

ε̇∝ρ2

D

ε̇∝ρ


(b,d) is the correct answer.

Ques 32 GATE 2022

Figures P, Q, R and S schematically show the atomic dipole moments in the absence of external magnetic field. Which one of the following is the correct mapping of nature of magnetism to atomic dipole moments?

A

P - Diamagnetism, Q- Antiferromagnetism, R - Paramagnetism, S- Ferromagnetism

B

P-Ferromagnetism, Q - Antiferromagnetism, R - Diamagnetism, S-Paramagnetism

C

P-Paramagnetism, Q- Ferromagnetism, R - Diamagnetism, S-Antiferromagnetism

D

P-Ferromagnetism, Q - Diamagnetism, R - Antiferromagnetism, S-Paramagnetism


(b) is the correct answer.

Ques 33 GATE 2022

Find the correct match between dislocation reactions (Column A) to the descriptions (Column B)

A

P-3, Q-2, R-1

B

P-3, Q-1, R-2

C

P-2, Q-3, R-1

D

P-2, Q-1, R-3


(b) is the correct answer.

Ques 34 GATE 2022

Match the phenomena (Column I) with the descriptions (Column II)

A

P-1, Q-2, R-3, S-4

B

P-1, Q-2, R-4, S-3

C

P-3, Q-4, R-1, S-2

D

P-3, Q-1, R-4, S-2


(c) is the correct answer.

Ques 35 GATE 2022

Which of the following statement(s) is (are) TRUE about black body radiation?

A

Among all radiation emitted by an ideal black body at room temperature, the most intense radiation falls in the visible light spectrum

B

The total emissive power of an ideal black body is proportional to the square of its absolute temperature

C

The emissive power of an ideal black body peaks at a wavelength which is inversely proportional to its absolute temperature

D

The radiant energy emitted by an ideal black body is greater than that emitted by the non-black body at all temperatures above 0 K


(c,d) is the correct answer.

Ques 36 GATE 2022

From high temperature tensile testing, the flow stress (measured at the same value of strain) of an alloy was found to be 50 MPa at a strain rate of 0.1s-1 and 70 MPa at a strain rate of 10 s-1. The strain rate sensitivity parameter is _______ (round off to 3 decimal places).


(0.075) is the correct answer.

Ques 37 GATE 2022

Consider a tilt boundary of misorientation of 2o in an aluminium grain. The lattice parameter of aluminium is 0.143 nm. The spacing between the dislocations that form the tilt boundary is _______ nm (round off to 2 decimal places).


(2.93) is the correct answer.

Ques 38 GATE 2022

High cycle fatigue data for an alloy at various alternating stresses, σa (see figure) is given below.

A specimen of this alloy is subjected to multiple stress cycles sequentially in the following order: (i) first 5000 cycles at σa=400 MPa followed by (ii) 25000 cycles at σa=300 MPa and finally (iii) at σa=500 MPa. Assuming that Miner's law is obeyed, the number of cycles to failure at the final applied stress of 500 MPa is _______.


(250) is the correct answer.

Ques 39 GATE 2022

During solidification of a pure metal, the radius of critical nucleus at an undercooling of 10 K is _______ x10-9 m (answer rounded off to 1 decimal place).
Given: solid/liquid interface energy =0.177 J⋅m-2;
melting point of the metal =1356 K and
latent heat of fusion =1.88x109 J⋅m-3


(25.9) is the correct answer.

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