
METE230 - Chapter 4
Quiz
•
Engineering
•
University
•
Practice Problem
•
Hard
İrem Özbilgin
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a point defect?
Vacancy
Interstitial atom
Edge dislocation
Substitutional impurity
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of dislocation has a Burgers vector perpendicular to the dislocation line?
Edge dislocation
Screw dislocation
Mixed dislocation
Planar dislocation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The number of vacancies in a material increases exponentially with:
Temperature
Stress
Grain size
Atomic radius
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes a grain boundary?
A perfect alignment of atoms in a lattice
The region between two differently oriented crystals
A type of point defect
A one-dimensional defect
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when a substitutional impurity atom is larger than the host atoms?
It creates a vacancy
It has no effect on the lattice
It causes distortion in the lattice
It produces compressive strain in the lattice
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of dislocation results in a helical atomic arrangement around the core?
Edge dislocation
Screw dislocation
Mixed dislocation
Interstitial dislocation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Grain boundaries generally have:
Lower energy than the bulk material
Higher energy than the bulk material
No effect on mechanical properties
A perfect atomic arrangement
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