1.2 Metals & alloys

Where are the majority of metals extracted from?

What name is given to metals that are mixed with other metals to improve their properties?

There are two main types of metals identify them from the choice below?

• ferrous

• non-ferrous

• metallic

• magnetic

What name is given to the process when a metal is not heated before work is done to it which causes the grains in the affected area to stretch out making them thinner and smaller?

• hot working
• annealing
• quenching
• cold working

Which process makes a metal softer and easier to work by increasing the grain size of the metal?

• annealing
• quenching
• tempering
• hardening

Which process makes work hardened steel tougher and adds some ductility?

• normalising

• quenching
• tempering
• forging

Heat treatment can be used to make high carbon steel harder and tougher.. The steel is heated and then cooled rapidly then tempered. What name is given to the rapid cooling process|?

• normalising

• annealing

• tempering
• quenching

What name is given to the hardening process that involves adding carbon to the outer surface of steel?

• carburizing
• quenching
• annealing
• tempering

What name is given to a metals surface that has reacted with its environemnt?

• oxidation
• corrosion
• rusting
• erosion

What name is given to the process that uses heat treatment to remove some of the brittleness in hardened steel at the cost of some of the hardness?

• quenching
• forging
• tempering
• annealing