ESE 2021 Technical Quiz 107 || Crystal structure & defects

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Question 1

Schottky defect includes:

• AVacancy defect
• BSurface defect
• CComposition defect
• DInterstitial defect

Question 2

The crystal structure of Cementite is:

• ABody centered cubic (BCC)
• BRhombohedral
• CBody centered Tetragonal (BCT)
• DOrthorhombic

Question 3

Imperfections in the crystal structure result in

• ADecreased mobility
• BIncreased mobility
• CDecreased conductivity
• DIncreased conductivity

Question 4

Match elements with their correct crystal structure?

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

Question 5

The crystal structure of austenite is _________.

• ABCC
• BFCC
• CHCP
• DBCT

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