Q.1
On heating, one solid phase results in another solid phase and a liquid phase during __________ reaction.
  • a) Eutectoid
  • b) Peritectic
  • c) Eutectic
  • d) Peritectoid
Q.2
A first solid phase results in a second solid phase another third solid phase on cooling during __________ reaction.
  • a) Eutectoid
  • b) Peritectic
  • c) Eutectic
  • d) Peritectoid
Q.3
A first solid phase results in a second solid plus another third solid phase upon heating during __________ reaction.
  • a) Eutectoid
  • b) Peritectic
  • c) Eutectic
  • d) Peritectoid
Q.4
Which phase will crystallize first just below the liquidus line?
  • a) α phase
  • b) β phase
  • c) (L+α) phase
  • d) (L+β) phase
Q.5
At what temperature, all liquid and α will convert to β?
Questionmaterials-science-questions-answers5.jpg
  • a) Eutectic temperature
  • b) Peritectic temperature
  • c) Eutectoid temperature
  • d) Peritectoid temperature
Q.6
Any composition left and right of P will generate ___________
Questionmaterials-science-questions-answers6.jpg
  • a) Excess of liquid and α
  • b) Excess of α and liquid
  • c) Excess of liquid and β
  • d) Excess of β and liquid
Q.7
Which of the following are Peritectic systems?
  • a) Pt – Ag
  • b) Ni – Re
  • c) Ni – Re, Fe – Ge, Sn-Sb
  • d) Pt – Ag, Ni – Re, Fe – Ge, Sn-Sb
Q.8
What is the eutectoid structure of Iron?
  • a) Cementite
  • b) Ferrite
  • c) Pearlite
  • d) Austentite
Q.9
What is the maximum %C by weight in hypo-eutectoid steels?
  • a) 0.5%
  • b) 0.7%
  • c) 0.8%
  • d) 1.2%
Q.10
The phase above eutectoid temperature for carbon steels is known as _______
  • a) Cementite
  • b) Ferrite
  • c) Pearlite
  • d) Austentite
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