Mechanical Engineering Questions And Answers :: Engineering Materials: part1



Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part1 : 1 to 5

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

1.Pure iron is the structure of

ferrite
pearlite
anstenite
ferrite and cementite
ferrite and pearlite.

2.Points of arrest for iron correspond to

stages at which allotropic forms change
stages at which further heating does not increase temperature for some time
stages at which properties do not change with increase in temperature
there is nothing like points of arrest
none of the above.

3.A reversible change in the atomic structure of steel with corresponding change in the properties is known as

molecular change
physical change
allotropic change
solidus change
atomic change.

4.Paramagnetic alpha iron changes to gamma iron at

770�C
910�C
1440�C
1539�C
none of the above.

5.The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00�C will

increase
decrease
remain same
first increase and then decrease
show unpredictable behavior.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

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