Thermal Processing Techniques MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Thermal Processing Techniques”.

1. Which is the correct order of temperature arranged in ascending order of the following processes?

i. Partial annealing	
ii. Full annealing	
iii. Subcritical annealing

a) iii, i, ii
b) ii, iii, i
c) iii, ii, i
d) i, iii, ii

2. Which of the following can be recrystallization temperature for a pure metal? (where Tm is melting point of the metal)
a) 0.3 Tm
b) 0.45 Tm
c) 0.35 Tm
d) 0.4 Tm

3. Which of the following is an application of cold working?
a) Extrusion
b) Forging
c) Hot rolling
d) Deep drawing

4. What does the term soaking signify?
a) Heating to a required temperature
b) Holding at a constant temperature
c) Cooling the material
d) Heating for a long time

5. In process annealing, heating is limited to avoid excessive oxidation.
a) True
b) False

6. Which material is present above the upper critical temperature line in an iron carbon phase diagram?
a) Martensite
b) Pearlite
c) Ledeburite
d) Austenite

7. Which of the following will not happen when metal is cooled fast in annealing?
a) Warping of material
b) Cracking of material
c) Formation of thermo elastic stresses
d) Strength increase

8. Which of the following does not happen when a material is annealed?
a) Internal stresses get relieved
b) Increase in ductility
c) Decrease in toughness
d) Increase in softness

9. In stress relief annealing, the annealing temperature is relatively low.
a) True
b) False

10. Which of the following is not a type of annealing?
a) Spherodizing
b) Tempering
c) Full annealing
d) Stress-relief annealing

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