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MCQs

Total Questions : 52 | Page 1 of 6 pages
Question 1. What is the Faraday’s constant?
  1.    96.49 kC mol⁻¹
  2.    99.01 kC mol⁻¹
  3.    100.3 kC mol⁻¹
  4.    104.49 kC mol⁻¹
 Discuss Question
Answer: Option A. -> 96.49 kC mol⁻¹
Answer: (a).96.49 kC mol⁻¹
Question 2. What is the Piling-Bedworth ratio of MgO?
  1.    0.41
  2.    0.79
  3.    1.71
  4.    2.03
 Discuss Question
Answer: Option B. -> 0.79
Answer: (b).0.79
Question 3. What is the free energy of formation value for Al₂O₃?
  1.    419 kJ mol⁻¹
  2.    1045 kJ mol⁻¹
  3.    1576 kJ mol⁻¹
  4.    2562 kJ mol⁻¹
 Discuss Question
Answer: Option C. -> 1576 kJ mol⁻¹
Answer: (c).1576 kJ mol⁻¹
Question 4. How is the Faraday’s constant defined?
  1.    F = e Nᴀ
  2.    F = e / Nᴀ
  3.    F = e + Nᴀ
  4.    F = Nᴀ / e
 Discuss Question
Answer: Option A. -> F = e Nᴀ
Answer: (a).F = e Nᴀ
Question 5. A galvanic cell set up due to differences in the concentration of metal ion is known as ________
  1.    Concentration ion
  2.    Concentration cell
  3.    Admiralty ion
  4.    Admiralty cell
 Discuss Question
Answer: Option B. -> Concentration cell
Answer: (b).Concentration cell
Question 6. The rate of crack propagation in brittle fracture is _______
  1.    Nonexistent
  2.    Slow
  3.    Rapid
  4.    Random
 Discuss Question
Answer: Option C. -> Rapid
Answer: (c).Rapid
Question 7. Which of the following can be applied to prevent ductile fracture?
  1.    Fine grains
  2.    Low hardness
  3.    Low Young’s modulus
  4.    High-temperature treatment
 Discuss Question
Answer: Option A. -> Fine grains
Answer: (a).Fine grains
Question 8. __________ can be added to steels to prevent intergranular failure.
  1.    Sulfur
  2.    Manganese
  3.    Silicon
  4.    Wood
 Discuss Question
Answer: Option B. -> Manganese
Answer: (b).Manganese
Question 9. Which of the following is not applicable for prevention of fatigue fracture?
  1.    Reduction of corrosive environment
  2.    Coarse grain structure
  3.    No residual stresses
  4.    Good surface finish
 Discuss Question
Answer: Option B. -> Coarse grain structure
Answer: (b).Coarse grain structure
Question 10. Pyroceram has excellent thermal resistance due to its ________
  1.    Surface finish
  2.    Melting point
  3.    Ion exchange
  4.    Grain size
 Discuss Question
Answer: Option D. -> Grain size
Answer: (d).Grain size

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