GATE MT branch:mt PYQs & Answers — Page 44

Questions 431–440 of 650. Imported answers require independent review unless marked reviewed.

has ______ at

Your answerChoose one option.

a local minimum

a local maximum

a point of inflection

a non-zero slope

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the processes in Column I with the most appropriate mechanisms in Column II.

Column I (P) Blast furnace iron making process (Q) Hall-Heroult's process (R) Basic oxygen furnace steel making process (S) Kroll's process

Column II

Metallothermic reduction

Oxidation

Carbothermic reduction

Fused salt electrolysis

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the reactors in Column I with the corresponding products in Column II.

Column I (P) COREX (Q) MIDREX (R) Flash smelting reactor (S) Submerged arc furnace

Column II

Sponge iron

Copper matte

Hot metal or pig iron

Ferrochrome

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

X-ray diffraction pattern from an element metal with a FCC crystal structure shows the first peak at a Bragg angle

. The lattice parameter of this metal is ______ nm.

Given, wavelength of the X-ray used is 0.1543 nm.

Your answerChoose one option.

0.185

0.262

0.320

0.370

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the materials in Column I with their common applications in Column II.

Column I (P) Gray iron (Q) Ductile iron (R) Zirconium alloy (S) Beryllium-Copper alloy

Column II

Cladding for uranium fuel in nuclear reactor

Base structure of heavy machines

Valves and pump bodies

Jet aircraft landing gear bearings

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The Mg-Sn phase diagram exhibits two eutectics on either side of the high melting intermetallic line compound, Mg

Sn, as given below.

At 561°C: L (36.9 wt.% Sn) → α (14.48 wt.% Sn) + Mg

At 203°C: L (97.87 wt.% Sn) → β-Sn (almost 100 wt.% Sn) + Mg

After the eutectic reaction has gone to completion and equilibrium has been attained at a temperature just below 561°C, the amount of eutectic constituent present in the alloy, Mg-50 wt.% Sn, is approximately ______ (in wt.%).

Given, atomic weight of Sn is 118.7 and Mg is 24.3

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]

Assertion [a]: Low-alloy steels used for medium-temperature creep resistance often have additions of strong carbide-forming elements.

Reason [r]: During creep deformation, the particles with higher misfit with the matrix, lose coherency.

Your answerChoose one option.

Both [a] and [r] are true and [r] is the correct reason for [a].

Both [a] and [r] are true but [r] is not the correct reason for [a].

Both [a] and [r] are false.

[a] is true but [r] is false.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]

Assertion [a]: The rate of homogenization in a dilute substitutional solid solution of B in A is controlled by the diffusivity of B.

Reason [r]: Atomic migration cannot occur along dislocations and grain boundaries.

Your answerChoose one option.

Both [a] and [r] are true and [r] is the correct reason for [a]

Both [a] and [r] are true but [r] is not the correct reason for [a]

Both [a] and [r] are false

[a] is true but [r] is false

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the elements in Column I with their electronic behavior given in Column II.

Column I: (P) Copper (Q) Iron (R) Mercury (S) Silicon

Column II:

Ferromagnetic

Superconducting

Semiconducting

Diamagnetic

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Radius of the largest interstitial atom that can be accommodated in an octahedral void in BCC iron without distorting the lattice is ______ nm (round off to three decimal places).

Assume hard sphere model and radius of Fe atom as 0.124 nm.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE MT branch:mt PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40