Mechanical Engineering Questions And Answers :: Engineering Materials: part4

Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part4 : 11 to 15

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

11.Manganese in steel increases its

tensile strength

12.Hardness of martensite is about

RC 65
RC 48
RC 57
RC 80
RC 32.

13.Which is false statement about case hardening. Case hardening is done by

induction hardening
flame hardening.

14.Amorphous material is one

in which atoms align themselves in a geometric pattern upon solidification
in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
which is not attacked by phosphorous
which emits fumes on melting
none of the above.

15.The surface hardness of the following order is achieved by nit riding operation

600 VPN
1500 VPN
1000 to 1100 VPN
250 VPN
2000 VPN.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

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