Mechanical Engineering Questions And Answers :: Engineering Materials: part4

Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part4 : 16 to 20

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2021 and IES 2021 examinations :

16.Process of austempering results in

formation of bainite structure
carburised structure
martenistic structure
lamellar layers of carbide distributed throughout the structure
relieving of stresses throughout a com-ponent.

17.Sulphur in steel

acts as deoxidiser
reduces the grain size
decreases tensile strength and hard-ness
lowers the toughness and transverse ductility
increases hardness.

18.Hardness of lower bainite (tempered martensite) is about

RC 65
RC 48
RC 57
RC 80
RC 32.

19.An example of amorphous material is


20.Carbon in iron is an example of

substitutional solution
interstitial solid solution
intermetallic compounds
all of the above
none of the above.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

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