Online exam on Material science

Please select the correct answer from the bellow multiple choice. Every question contain 2 marks. It has no negative marking, correct answer bring you two have to answer 25 question to complete the exam. After select the correct answer press “Show Answer” button it will show the correct result and then press the “Next” button to get next question. End of exam you will see your overall result with grade card. so check your preparation


online exam 

Following is wrong about a phase diagram.


First metal known to be used by man


Kevlar is commercial name for ___________


Grain boundaries are:


Overall transformation rate changes with temperature as follows:


An invariant reaction that produces a solid up on cooling two liquids:


In a bcc structure, the lattice constant, a, and the atom radius, R, have the following relationship:


Impurity not responsible for temper embrittlement


Gibbs phase rule for general system:


A metallic bond forms by


The number of atoms in a unit cell of bcc, fcc and hcp metals are


The degree of freedom at triple point in unary diagram for water ________.


Not a basic step of precipitation strengthening


In general, strongest polymer group is __________


The word ‘polymer’ meant for material made from ______________.


Very electronegative atoms (Cl) are most likely to


Mg has an atomic number Z = 12. The electronic configuration for a magnesium ion with a plus two (+2) charge is:


Strong and ductile materials


Figure out the odd statement about ceramics in the following


Interstitials are:


100 g of solder contains 52 wt% tin (Sn) and 48 wt% lead (Pb). The atomic weight of Sn is 118.7 g/mol, and the atomic weight of Pb is 207.2 g/mol.

No. of mole of Sn in the solder is:


The boundary line between (liquid) and (liquid+solid) regions must be part of _________.


Atomic number equals


The size of a unit cell is described by:


Not a Hume-Ruthery condition: