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 

The size of a unit cell is described by:


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


Atomic number equals


Grain boundaries are:


Strong and ductile materials


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:


Following is wrong about a phase diagram.


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


Kevlar is commercial name for ___________


Gibbs phase rule for general system:


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


Overall transformation rate changes with temperature as follows:


Not a basic step of precipitation strengthening


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


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


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


A metallic bond forms by


Interstitials are:


Figure out the odd statement about ceramics in the following


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


Very electronegative atoms (Cl) are most likely to


Not a Hume-Ruthery condition:


Impurity not responsible for temper embrittlement


In general, strongest polymer group is __________


First metal known to be used by man