This set of Engineering Materials Science "Multiple Choice Questions & Answers" are based on "PHASE TRANSFORMATION"
PHASE TRANSFORMATION
Multiple Choice Questions (MCQ)
Hello reader, here you can find some MCQ with answers. But before reading this I will suggest you take a practice test on these questions given below. so you can understand your strength on this topic.
Click here to go Practice Test section on this topic namely Phase Transformation.
But if you want to read this topic first and then practice it then read it carefully. The Multiple Choice Questions (MCQ) based on Phase Transformation are given below:
PART - IV
1) Which of the following is hardest in nature?
Correct Answer is "D"
Martensite is the hardest in nature among them.
2) Which of the following iron-carbon mixture is produce from Annealing (furnace cooling)?
Correct Answer is "A"
Coarse pearlite is produced from Annealing (furnace cooling)
3) Which of the following iron-carbon mixture is produce from Quenching (water cooling)?
Correct Answer is "D"
Martensite is produced from Quenching (water cooling)
4) Which of the following iron-carbon mixture is produce from Normalizing (air cooling)?
Correct Answer is "B"
Fine pearlite is produced from Normalizing (air cooling)
5) Schematic room-temperature microstructures for four iron-carbon alloys are as follows. Rank these microstructures (by letter) from the softest to the hardest.
Correct Answer is "C"
A is pure ferrite which has less carbon(0.022%),
B is hypo pearlite (Coarse) which has carbon composition greater than pure ferrite but less than eutectoid pearlite,
D is another hypo pearlite (Fine) but it has carbon content greater than B,
C is hyper pearlite which has carbon content greater than eutectoid but less than cementite.
As we know with increasing carbon content hardness increases so the order of hardness is A<B<D<C
B is hypo pearlite (Coarse) which has carbon composition greater than pure ferrite but less than eutectoid pearlite,
D is another hypo pearlite (Fine) but it has carbon content greater than B,
C is hyper pearlite which has carbon content greater than eutectoid but less than cementite.
As we know with increasing carbon content hardness increases so the order of hardness is A<B<D<C
6) Continuous cooling of Austenite always results in the formation of
Correct Answer is "B"
Continuous cooling of Austenite always results in the formation of Pearlite
7) High-temperature heat treatment of Martensite gives
Correct Answer is "D"
High-temperature heat treatment of Martensite gives Spheroidite
8) Arrange the following microconstituents in order of increasing ductility
(A)Fine Pearlite
(B)Coarse Pearlite
(C)Bainite
(D)Spheroidite
Correct Answer is "C"
Increasing order of ductility among the given microconstituents is
Bainite < Fine Pearlite < Coarse Pearlite < Spheroidite
Bainite < Fine Pearlite < Coarse Pearlite < Spheroidite
9) In an isothermal curve, which of the following is true when the temperature is decreased?
Correct Answer is "D"
In an isothermal curve, the curve shifts leftward when the temperature is decreased.
10) Which of the following phase will be resulted when the transformation temperature of steel is in the range of 215 °C to 540 °C?
Correct Answer is "C"
Bainite phase will result when the transformation temperature of steel is in the range of 215 °C to 540 °C
Do you read all the questions and answers given above carefully? let's make a practice on all the questions given above.
Go to: Practice Test on Phase Transformation (MCQ) Part - IV
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