QUESTION $1$

$[25$ Marks$]$

i$.$ What are materials? List eight commonly encountered engineering materials.

$[10$ Marks$]$

ii$.$ List any five engineering materials used in everyday life and identify a technology that each

made possible.

$[10$ Marks$]$

iii. $8.$ Coiled springs ought to be very strong and stiff. Si$3$N$4$ is a strong and stiff material. Explain

with reason, why would you recommend or not recommend this material for a spring?

$[5$ Marks$]$