GATE MT branch:mt PYQs & Answers — Page 15

Questions 141–150 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 15 of 65

and

are independent normally distributed random variables with means

and

, and variances

and

, respectively, then the combination

has mean

and variance

such that

Your answerChoose one option.

and

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Which one of the following is the Taylor-series expansion of

about the origin for

is a real number.

Your answerChoose one option.

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Consider the normal (Gaussian) distributions

shown in the figure.

and

are the standard deviation and mean of distribution

, respectively, and the means are positive. Which one of the following deductions is correct?

Diagram for Metallurgical Engineering question 13

Your answerChoose one option.

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If in an A-B solid solution, the activity and mole fraction of A are given by

and

, respectively, then the activity coefficient of A is given by

Your answerChoose one option.

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As shown in the figure, two rods of different metals of equal lengths,

, diameter

(

), and constant thermal conductivities

and

(with

) are connected perfectly (i.e., zero interface thermal resistance). The left and right ends of the connected rod are maintained at temperatures

and

(

). Assume that the rods are insulated from the environment, apart from the two flat ends. Which one of the following graphs represents the temperature distribution at steady-state? The thick line shows the temperature profile. The horizontal axis shows the distance from the left end of the rod to the right and the vertical axis denotes temperature.

Diagram for Metallurgical Engineering question 15

Your answerChoose one option.

Diagram for Metallurgical Engineering question 15 (figure 2)

Diagram for Metallurgical Engineering question 15 (figure 3)

Diagram for Metallurgical Engineering question 15 (figure 4)

Diagram for Metallurgical Engineering question 15 (figure 5)

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Match the laws listed in Column I with the corresponding material properties listed in Column II

Column I (P) Hooke’s law (Q) Fick’s law (R) Fourier’s law (S) Darcy’s law

Column II (1) Thermal conductivity (2) Young’s modulus (3) Permeability (4) Diffusivity

Your answerChoose one option.

P – 2, Q – 1, R – 4, S – 3

P – 4, Q – 3, R – 1, S – 2

P – 2, Q – 4, R – 1, S – 3

P – 4, Q – 3, R – 2, S – 1

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Wet high intensity magnetic separators (WHIMS) are used to concentrate

Your answerChoose one option.

fine (< 75 μm) paramagnetic minerals.

coarse (> 75 μm) ferromagnetic minerals.

coarse (> 75 μm) paramagnetic minerals.

fine (< 75 μm) ferromagnetic minerals.

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Which one of the following reagents is NOT used in froth flotation process?

Your answerChoose one option.

Lixiviants

Collectors

Activators

Depressants

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Which one of the following reactions is the Boudouard’s reaction? Given: (s): solid, (l): liquid, (g): gas

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Which one of the following processes is NOT related to the extraction and refining of titanium from ilmenite ore?

Your answerChoose one option.

Pidgen’s process

Sorel process

Van Arkel process

Kroll’s process

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GATE MT branch:mt PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20