The study of metallographic includes ____

In metallography, microscopic method provides information about _____

A. impurities in a metal

B. location and extent of segregation

C. uniformity of structure

D. all of the above

In microscopy, which illumination parameter is used for producing images with dark non-flat structure and bright back ground?

A. Bright field illumination

B. Dark field illumination

C. Both a. and b.

D. None of the above

What is meant by recalescence in cooling curves?

A. Time required for liquefying solid components

B. Time required for completely solidifying the casted components

C. The cooling curve formed due to latent heat of fission

D. Liberated heat increases temperature of an under cooled liquid metal during nucleation

The cooling curve formed when a material is solidified due to latent heat of fusion is called as ______.

A. Undercooling

B. Solidification

C. Thermal arrest

D. Thermometry

Austenite phase in Iron-Carbon equilibrium diagram _______

A. is face centered cubic structure

B. has magnetic phase

C. exists below 727 °C

D. all of the above