Metallurgy Subject MCQ In Mechanical Engineering
1. To Transform retained austenite to martensite which of the following treatment is employed?
a) Hardening
b) Hardening & Tempering
c) Secondary Hardening
d) Subzero Treatment✅
2. Pearlite is product of ___________ transformation.
a) Monotectic
b) Eutectic
c) Eutectoid✅
d) Peritectic
3. Which of the following annealing treatments are carried out by heating the steel above A3 temperature ? *
a) Spherodising annealing
b) Process annealing
c) Homogenization annealing
d) Full annealing
e) Both c & d✅
4. Micro-structure produced by Austempering process consists of ________________.
a) Bainite✅
b) Fine Pearlite
c) Martensite
d) Coarse Pearlite
5. Micro-structure produced by Spheroidising process consists of ________________.
a) Bainite
b) Fine Pearlite
c) Martensite
d) Globular Pearlite✅
6. Which of the following treatments is based on isothermal transformation of austenite?
a) Normalizing
b) Martempering
c) Austempering✅
d) Full annealing
Engineering M3 MCQ :- https://www.articleraja.online/2021/07/engineering-mathematics-3-objective.html
7. Which of the following treatments is carried out to improve machinability of hyper-eutectoid steels ?
a) Homogenization
b) Spherodising✅
c) Recovery
d) Recrystallization annealing
8. Which of the following surface hardening treatment is carried out below A1 temperature?
a) Gas carburizing
b) Induction hardening
c) Carbonitriding
d) Nitriding✅
9. Which of the following steel is non hardenable by HT?
A) HSLA Steel ✅
B) 304 St. Steel
C) HCHC Steel
D) Maraging Steel
10. Nitriding treatment is carried out by heating the steel in the range of------------- °C.
a) 200 – 300°C
b) 500 – 550°C✅
c) 650 – 700°C
d) Above A3 temp of steel
11. Which of the following surface hardened steels have martensite in their microstructure?
a) Gas carburized
b) Induction Hardened
c) Flame Hardened
d) Nitrided
e) a,b & c✅
12. After homogenization, which of the following treatment is carried out?
A) Full Annealing
B) Spherodising
C) Isothermal Annealing
D) No Any Treatment✅
13. Micro-structure produced by Martempering process consists of ________________.
a) Bainite
b) Fine Pearlite
c) Martensite✅
d) Coarse Pearlite
14. Duralumin is an alloy of_________________.
a) Al-Cu.✅
b) Al-Si.
c) Al-Mg
d) Cu-Zn
15. Higher critical cooling rate, greater will be amount of retained austenite.
a) True✅
b) False
16. Which of the following treatments will result in formation of Martensite in structure of steel ? *
a) Patenting
b) Austempering
c) Martempering
d) Hardening
e) Martempering & Hardening✅
17. Austempering treatment gives ___________ structure.
a) Bainite✅
b) Martensite
c) Fine pearlite
d) Globular pearlite
18. Which of the following annealing processes are called sub critical annealing?
a) Recovery
b) Recrystallization✅
c) Homogenization
d) Spherodisation
19. Cold worked parts are subjected to__________.
a) Full-annealing✅
b) Spherodising Annealing
c) Homogenising Annealing
d) Recrystallization Annealing
20. Which of the following treatment is based on isothermal transformation of austenite.
a) Annealing
b) Normalizing
c) Patenting✅
d) Tempering
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