Mechanical Engineering Questions And Answers :: Engineering Materials: part1



Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part1 : 11 to 15

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

11.Which of the following constituents of steels is softest and least strong

austenite
pearlite
ferrite
cementlte
bainite.

12.Recrystallization temperature is one

at which crystals first start forming from molten metal when it is cooled
at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated
at which change of allotropic form takes place
at which crystals grow bigger in size
at which crystals are destroyed on heating.

13.Gamma iron exits at following temperature

room temperature
near melting point
between 1400�C and 1539�C
between 910�C and 1400�C
none of the above.

14.The following types of materials are usually the most ductile

face-centred cubic lattice
body-centred cubic lattice
hexagonal close-packed lattice
all of the above
none of the above.

15.Delta iron occurs at temperature of

room temperature
above melting point
between 1400�C and 1539�C
between 910�C and 1400�C
none of the above.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

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