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GATE 2020: Manufacturing Quiz 14

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Question 1

If a particular Fe–C alloy contains less than 0.83% carbon, it is called

Question 2

For converting the steel into 100% martensite, it is quenched into a bath of liquid N₂, this process is called________.

Question 3

The figure below shows the TTT diagram of eutectoid steel for which the following microstructures are to be matched :

1) Fine pearlite

2) Martensite

3) Bainite

4) Coarse pearlite

The correct match will be :

Question 4

In the phase diagram shown in the figure, four samples of the same composition are heated to temperatures marked by a, b, c and d.

At which temperature will a sample get solutionized the fastest?

Question 5

Match the heat treatment processes (Group A) and their associated effects on properties (Group B) of medium carbon steel

Question 6

The ratio of mass fraction of Eutectoid ferrite to that of Pro-Eutectoid ferrite with 0.4% C in Fe-C alloy is _________? (Take eutectoid carbon% as 0.8)

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ESE & GATE ME General

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