W2018 MTL 200 M1

General Test Information

• Date: Friday February 16, 2018

• Department: Mechanical and Industrial Engineering, Ryerson University

• Course: Materials Science I (MTL 200)

• Test Duration: 80 minutes

• Instructor: Prof. A. Varvani

Test Instructions

• Closed book test.

• Calculator allowed.

• Choose the best answer for multiple choice questions.

• Use pencil for Scantron sheet.

• Extra pages can be used if needed.

• Questions 1-20: 2 marks each; Questions 21-40: 3 marks each.

Sample Questions

Question 1

• Topic: Electron Arrangement in Ni (Z=28)

• Question Type: Multiple Choice

Question 2

• Topic: Atomic Bonding Types

• Options:

  • (a) Ionic, van der Waals, Metallic, Covalent, Hydrogen

  • (b) Ionic, Covalent, Metallic, Covalent, Hydrogen

  • (c) Ionic, Covalent, Metallic, van der Waals, Hydrogen

Question 3

• Topic: Interstitial Atoms in FCC/BCC

• Options: Various coordinates

Question 4

• Topic: Crystallographic Directions and Planes

• Options Identifying the Correct Relationships

Additional Concepts

• Understanding how solidification rates impact amorphous vs crystalline structure.

• The role of grain size in material strength based on the Hall-Petch relationship.

• Techniques for microscopic analysis in materials science, including Optical Microscopy and Scanning Electron Microscopy.

Notable Definitions

• Secondary Bonds: Weak interactions, particularly among noble gases.

• Atomic Packing Factor: How closely atoms are packed in a crystal structure.

• Diffusion: Atomic motion in a substance leading to uniform composition in material analysis.

Important Theories

• Fick's First Law of Diffusion: Relates to diffusion rates within thin plates.

• Bragg's Law: Used for determining angles in x-ray diffraction.