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Engineering Physics by S. Mani Naidu

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Multiple Choice Questions

  1. If the atoms or molecules in a solid are periodical at regular intervals of distances in three dimensions, then that solid is known as:     ( )
    1. crystalline solid
    2. amorphous solid
    3. liquid crystals
    4. none
  2. Unit cells for most of the crystals are:     ( )
    1. spherical
    2. elliptical
    3. parallelopiped
    4. none
  3. Crystallographic axes are obtained by the intersection of _____ non-coplanar faces of the unit cell.     ( )
    1. three
    2. four
    3. five
    4. six
  4. The number of crystal systems is:     ( )
    1. 5
    2. 7
    3. 14
    4. 21
  5. The number of Bravais lattices is:     ( )
    1. 256
    2. 7
    3. 14
    4. 37
  6. A cubic crystal system is represented by:     ( )
    1. a = b = cα = β = γ ≠ 90°
    2. a = bcα = β = γ = 90°
    3. a = b = cα = β = γ = 90°
    4. abcα = β = γ = 90°
  7. Orthorhombic crystal system is represented ...

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