Heat Treatment(Engineering > Engineering Materials ) Questions and Answers

Question 1. Which of the following factors does not influence the variety and quality of metal?
  1.    Rate of heating and cooling
  2.    Quenching medium
  3.    Furnace
  4.    Grain size
Explanation:-
Answer: Option D. -> Grain size
Answer: (d).Grain size
Question 2. For full annealing of hypoeutectoid steels, they are heated in a range above __________
  1.    153-250°C
  2.    273-350°C
  3.    551-770°C
  4.    723-910°C
Explanation:-
Answer: Option D. -> 723-910°C
Answer: (d).723-910°C
Question 3. How does the rate of cooling affect the hardness of the metal?
  1.    Slow cooling, hard material
  2.    Slow cooking, soft material
  3.    Rapid cooling, soft material
  4.    No effective change
Explanation:-
Answer: Option B. -> Slow cooking, soft material
Answer: (b).Slow cooking, soft material
Question 4. Full annealing is applied to which kind of materials?
  1.    Steel castings
  2.    Steel wires
  3.    High carbon steels
  4.    Sheet products
Explanation:-
Answer: Option A. -> Steel castings
Answer: (a).Steel castings
Question 5. Which of the following is not a stage of annealing?
  1.    Heating
  2.    Soaking
  3.    Tempering
  4.    Quenching
Explanation:-
Answer: Option C. -> Tempering
Answer: (c).Tempering
Question 6. Low temperature tempering occurs at __________
  1.    50-150°C
  2.    150-250°C
  3.    350-450°C
  4.    500-650°C
Explanation:-
Answer: Option B. -> 150-250°C
Answer: (b).150-250°C
Question 7. Temper embrittlement occurs at a temperature __________
  1.    Below 0°C
  2.    Above 250°C
  3.    Above 575°C
  4.    Above 1000°C
Explanation:-
Answer: Option C. -> Above 575°C
Answer: (c).Above 575°C
Question 8. Tempering that results in a reduction of toughness is known as __________
  1.    Caustic embrittlement
  2.    Temper embrittlement
  3.    End-temper
  4.    Quench-temper embrittlement
Explanation:-
Answer: Option B. -> Temper embrittlement
Answer: (b).Temper embrittlement
Question 9. Medium temperature tempering develops a ________ structure.
  1.    Non-lamellar
  2.    Sorbite
  3.    Tempered-troostite
  4.    Bainite
Explanation:-
Answer: Option C. -> Tempered-troostite
Answer: (c).Tempered-troostite
Question 10. High temperature tempering develops a ________ structure.
  1.    Non-lamellar
  2.    Sorbite
  3.    Tempered-troostite
  4.    Pearlite
Explanation:-
Answer: Option B. -> Sorbite
Answer: (b).Sorbite
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