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?
- a) Eutectic temperature
- b) Peritectic temperature
- c) Eutectoid temperature
- d) Peritectoid temperature
Q.6.
Any composition left and right of P will generate ___________
- 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