List of top Metallurgy Questions

In optical microscopy, which one of the following combinations of wavelength ($\lambda$) and numerical aperture (NA) provides the best spatial resolution?
Calculate the Pilling-Bedworth ratio when Fe oxides to FeO. The atomic weight of Fe is 55.8 gm, the atomic weight of Oxygen is 16 gm, density of Fe is 7.87 gm/cc and density of FeO is 5.70 gm/cc
Which alloying element does not shift TTT diagram or does not retard the transformation of austenite to pearlite or bainite?
Critical resolved shear stress is expressed by the following equation
Anti-Phase Boundaries (APB) are existing in ____ strengthening mechanism
When two different metals placed in contact, when one is heated, an EMF is generated. This effect is called as
Cold working of metal reduces its
Electrode is consumed in ____ welding process
Which of the following is a eutectic reaction?
The collapsible toothpaste tube is produced by ____ extrusion
TIG is especially useful in welding for the following alloys
Which is the top-down approach method for the synthesis of Nano materials?
Dislocation tangles are the regions of
In Ellingham diagrams, the reaction that is parallel to the temperature axis is
The ideal theoretical shape of a Riser is
Dental alloys are casted by ____ process
Plastic goods are usually produced by
Blow holes are casting defects caused by
Ellingham diagrams for M ~MOx reactions is a plot of
Peritectic reaction among the following is
The free energy changes at equilibrium is
For a spontaneous process
Entropy is a measure of
Enthalpy "H" is defined as
Example of a sacrificial anode which is used in the protection of underground pipelines is