This set of Manufacturing Engineering Questions & Answers for freshers focuses on “Iron Carbon Phase Diagram”.
1. Which of the following material has the carbon varying from 2.1 to 4.3%?
a) Dead steel
b) Mild steel
c) Medium carbon steel
d) Cast iron
Answer: d
2. Which of the following material has the carbon varying from 4.3 to 6.67%?
a) Pig iron
b) Mild steel
c) Medium carbon steel
d) Cast iron
Answer: a
3. The eutectoid mixture of α+Fe3C is known as ______________
a) Ferrite
b) Pearlite
c) Cementite
d) Austenite
Answer: b
4. The BCC structure of Fe-C solid solution is known as ______________
a) Ferrite
b) Cementite
c) Pearlite
d) Austenite
Answer: a
5. The FCC structure of Fe-C solid solution is known as __________
a) Ferrite
b) Cementite
c) Pearlite
d) Austenite
Answer: d
6. Which of the following is soft in nature?
a) Coarse pearliite
b) Fine pearlite
c) Bainite
d) Martensite
Answer: a
7. Which of the following is hardest in nature?
a) Coarse pearliite
b) Fine pearlite
c) Bainite
d) Martensite
Answer: d
8. Which of the following iron carbon mixture, is the product of furnace cooling?
a) Coarse pearliite
b) Fine pearlite
c) Bainite
d) Martensite
Answer: a
9. Which of the following iron carbon mixture, is the product of water cooling?
a) Coarse pearliite
b) Fine pearlite
c) Bainite
d) Martensite
Answer: d
10. Which of the following iron carbon mixture, is the product of air cooling?
a) Coarse pearliite
b) Fine pearlite
c) Bainite
d) Martensite
Answer: b