Engineering Board Exam Reviewer · Engineering Materials · easy

A vacancy is a:

1. Extra atom squeezed between lattice sites
2. Missing atom at a normal lattice site
3. Line defect
4. Boundary between grains

Answer

B. Missing atom at a normal lattice site

Solution

Vacancies are point defects whose number increases with temperature.

More Engineering Materials questions

1. X-ray diffraction is used to determine:
2. The notation used to specify crystallographic planes is:
3. A material whose properties vary with crystallographic direction is said to be:
4. The ability of a material to exist in more than one crystal structure depending on temperature and pressure is called:
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8. The atomic packing factor (APF) of an FCC structure is:
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10. The number of atoms in an HCP unit cell (hexagonal prism) is:

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