Ferrous Materials(Engineering > Engineering Materials ) Questions and Answers

Question 1. What is the unit of diffusion coefficient?
  1.    mol m⁻² s⁻¹
  2.    mol m⁻³
  3.    m² s⁻¹
  4.    KJ mol⁻¹
Explanation:-
Answer: Option C. -> m² s⁻¹
Answer: (c).m² s⁻¹
Question 2. Which of the following is also known as mild steel?
  1.    Plain carbon steel
  2.    Low carbon steel
  3.    Medium carbon steel
  4.    High carbon steel
Explanation:-
Answer: Option B. -> Low carbon steel
Answer: (b).Low carbon steel
Question 3. Which of the following attributes explain why pure metals are not frequently used in engineering applications?
  1.    Hardness
  2.    Brittleness
  3.    Softness
  4.    Luster
Explanation:-
Answer: Option C. -> Softness
Answer: (c).Softness
Question 4. What is the diffusion constant (D₀) when copper is dissolved in copper?
  1.    0.2 * 10⁻⁴
  2.    0.15 * 10⁻⁴
  3.    1.98 * 10⁻⁴
  4.    5400 * 10⁻⁴
Explanation:-
Answer: Option A. -> 0.2 * 10⁻⁴
Answer: (a).0.2 * 10⁻⁴
Question 5. Plain carbon steels are alloys mainly consisting of _________
  1.    Iron and Carbon
  2.    Potassium and Iron
  3.    Carbon and Potassium
  4.    Carbon and Indium
Explanation:-
Answer: Option A. -> Iron and Carbon
Answer: (a).Iron and Carbon
Question 6. What is the composition of carbon in medium carbon steels?
  1.    0.05%
  2.    0.1% – 0.3%
  3.    0.25% – 0.6%
  4.    More than 0.6%
Explanation:-
Answer: Option C. -> 0.25% – 0.6%
Answer: (c).0.25% – 0.6%
Question 7. What is the maximum amount of manganese in carbon steels?
  1.    1.65%
  2.    1.50%
  3.    0.60%
  4.    0.40%
Explanation:-
Answer: Option A. -> 1.65%
Answer: (a).1.65%
Question 8. What is the maximum forging temperature of 1.1% carbon steel?
  1.    1049°C
  2.    1082°C
  3.    1140°C
  4.    1171°C
Explanation:-
Answer: Option B. -> 1082°C
Answer: (b).1082°C
Question 9. Which of these are applications of high-carbon steel?
  1.    Gears, valves
  2.    Steel wires, sheets, screws
  3.    Clutch discs, valve springs
  4.    Machine tools, leaf and coil springs
Explanation:-
Answer: Option D. -> Machine tools, leaf and coil springs
Answer: (d).Machine tools, leaf and coil springs
Question 10. Which steels are generally used for making connecting rods and gear shafts?
  1.    Low carbon steels
  2.    Medium carbon steels
  3.    High carbon steels
  4.    Stainless steels
Explanation:-
Answer: Option B. -> Medium carbon steels
Answer: (b).Medium carbon steels
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