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Q: The modulus of elasticity of ceramic ranges from:
  • A. 7 × 10⁴ N/mm² to 45 × 104 N/mm²
  • B. 10 × 10⁴ N/mm² to 42 × 104 N/mm²
  • C. 7 × 10⁴ N/mm² to 42 × 104 N/mm²
  • D. 8 × 10⁴ N/mm² to 40 × 104 N/mm²
Correct Answer: Option C - Mechanical properties of ceramic– • Theoretically, the tensile strength of ceramics is very high but in practice it is quite low. • The modulus of elasticity ranges from 7 × 10⁴ to 42 × 10⁴ N/mm² or 70-420 kN/mm²
C. Mechanical properties of ceramic– • Theoretically, the tensile strength of ceramics is very high but in practice it is quite low. • The modulus of elasticity ranges from 7 × 10⁴ to 42 × 10⁴ N/mm² or 70-420 kN/mm²

Explanations:

Mechanical properties of ceramic– • Theoretically, the tensile strength of ceramics is very high but in practice it is quite low. • The modulus of elasticity ranges from 7 × 10⁴ to 42 × 10⁴ N/mm² or 70-420 kN/mm²