GATE ME 2018 Exam: Engineering Material Quiz 3

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Question 1

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?

• Aa
• Bb
• Cc
• Dd

Question 2

Match List-I (Effect of Cooling) with List-II (Cooling Medium) and select the correct answer using the codes given below the lists:

• AA-1, B-4, C-2, D-3
• BA-2, B-3, C-1, D-4
• CA-2, B-3, C-4, D-1
• DA-1, B-2, C-3, D-4

Question 3

Which one of the following mediums is used for the fastest cooling rate of steel quenching _________?

• AAir
• BOil
• CWater
• DBrine

Question 4

Consider the following statements:
1) Heat treatment is effective only in case of certain alloys.
2) Cooling rate is an important factor in any heat treatment process.
3) The temperature at which the change starts on heating the steel is called lower critical temperature.
Which of the above statements are correct?

• A1 and 2 only
• B2 and 3 only
• C1 and 3 only
• D1, 2 and 3

Question 5

The recrystallization behavior of a particular metal alloy is specified in terms of recrystallization temperature, which is typically 1/3rd of the absolute melting temperature of a metal or an alloy and depends on several factors including the amount of
1) cold working and purity of the metal and alloy
2) hot working and purity of the metal and alloy
Which of the above is/are correct?

• A1 only
• B2 only
• CBoth 1 and 2
• DNeither 1 nor 2

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