The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?

Malleability of a material can be defined as ______________________?

A. ability to undergo large permanent deformations in compression

B. ability to recover its original form

C. ability to undergo large permanent deformations in tension

D. all of the above

E. none of the above

Mild steel belongs to the following category___________________?

A. low carbon steel

B. medium carbon steel

C. high carbon steel

D. alloy steel

E. special steel

Stress relaxation is- the phenomenon ___________________?

A. in which parts are not loaded

B. in which stress remains constant on in-creasing load

C. in which deformation tends to loosen the joint and produces a stress reduced

D. stress reduces on increasing load

E. none of the above

Isotropic materials are those which have the same ____________________?

A. elastic properties in all directions

B. stresses induced in all directions

C. thermal properties in all directions

D. electric and magnetic properties in all directions

E. density throughout

The ability of a material to resist softening at high temperature is known as____________________?

A. creep

B. hot tempering

C. hot hardness

D. fatigue

E. superhardening