Question $3$

a$)$ Materials Testing is classified into destructive and non$-$destructive. Describe the

following forms of non$-$destructive testing and give an example for each of their uses.

$($i$)$ Dye penetrant.

$($ii$)$ Magnetic powder.

b$)$ The mean length of the diagonal in a Vicker's Test was $1\mathrm{.}2$ mm under a load of $50$ kg $.$

Calculate the Hardness number.

d$)$ Briefly explain the following properties of materials:

i$.$ Tensile strength. $[2$ marks$]$

ii$.$ Resilience.

$[2$ marks$]$

Total: $10$ Marks