Bonus #5  (2 points)   Recycled scrap is a major source of copper metal.  Over ________% of the copper in products made today has been recycled from scrap.

Cold Working is

A grade five hex head cap screw contains  _______(number) lines on its head indicating the grade.

The material that surrounds and binds together fibers in a composite material is called the _________.

Brass contains what other metal along with copper

Bonus #1   __________________  ___________________  are chemical compounds made up of two or more metals that exhibit different properties than the original metallic elements.   2 point bonus

After quenching from high temperature, austenite becomes martensite, a different crystalline form of steel.

The use of a flat head screw requires what type of hole to be machined for it to fit in?

What do we call an iron carbon mixture that is almost pure iron with very little carbon in its composition?

Which of these metals has the best electrical conductivity