Mechanical Behaviour & Testing of Materials Mcqs

Q:

What is true for FCC crystal structure?

A) a?2 = 4r B) a?3 = 4r
C) a = 2r D) a?2 = 2r
 
Answer & Explanation Answer: A) a?2 = 4r

Explanation: For FCC unit cell, a?2 = 4r because face centered atom touches the corner atoms located at the face. a?3=4r is true for BCC unit cell and a = 2r for a simple cubic unit cell.

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