GATE MT topic:metallurgy PYQs & Answers — Page 42

Questions 411–420 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 42 of 65

Two solid spheres X and Y of identical diameter are made of different materials having thermal diffusivities

and

respectively. Both spheres are heated in a furnace maintained at 1000 K. If the center of the sphere X reaches 800 K in 1 hour, time required for the center of sphere Y to reach 800 K is

Your answerChoose one option.

1 hour.

2 hours.

4 hours.

16 hour.

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

Select the correct spectra (shown on a log-log scale in the figures) for emission from a gray surface and a black body, both maintained at 1000 K.

Your answerChoose one option.

Diagram for Metallurgical Engineering question 12

Diagram for Metallurgical Engineering question 12 (figure 2)

Diagram for Metallurgical Engineering question 12 (figure 3)

Diagram for Metallurgical Engineering question 12 (figure 4)

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

Given the three vectors

and

, which one of the following statements is TRUE?

Your answerChoose one option.

and

are mutually perpendicular.

and

are coplanar.

makes an angle of 30° with the normal to the plane containing

and

makes an angle of 60° with the normal to the plane containing

and

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

Angle between two neighboring tetrahedral bonds in Si having a diamond cubic structure is:

Your answerChoose one option.

102.5°

109.5°

120°

135.5°

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

The sequence of precipitation during aging of Al – 4 wt.% Cu alloy is:

Your answerChoose one option.

GP zone → θ″ → θ′ → θ

GP zone → θ → θ′ → θ″

GP zone → θ′ → θ″ → θ

θ″ → θ′ → GP zone → θ

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

The indenter used in Rockwell hardness measurements on C scale is

Your answerChoose one option.

diamond cone.

10 mm steel ball.

diamond pyramid.

1/16-in. steel ball

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

For the function

, the derivative

is:

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

Cupola is a furnace used to produce

Your answerChoose one option.

cast irons.

plain carbon steels.

copper alloys.

aluminum alloys.

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

The functions

and

intersect at the point:

Your answerChoose one option.

(1, 3)

(-2, 2)

(0, 1)

(-1, -1)

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

A heavily cold-worked metal will

Your answerChoose one option.

yield a coarser recrystallized grain size.

possess a lower driving force for recrystallization.

have a higher energy barrier for nucleation of recrystallized grains.

recrystallize at lower temperatures.

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

GATE MT topic:metallurgy PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20