Ferrous metals and heat treatment

What is the first form of iron from iron ore?

• Pig iron

• Cast iron

• Wroguht iron

• Melleable cast iron

Which one of the following metals is heavier than the others?

• Tin

• Lead

• Copper

• Aluminium

What is the name of the property of metal, it will break rather than bend under shock or impact?

• Ductility

• Toughness

• Brittleness

• Malleability

Which one of the following metal is used to make machine table and machine beds?

• PIg iron

• Cast Iron

• Wrought Iron

• Plain Carbon Stell

Which one of the following elements(%) is used to classify plain carbon steel?

• NIckel

• Carbon

• Cobalt

• Manganese

The percentage of carbon content in plain carbon steel is used to make high tensile tubes

• 0.3 to 0.5%

• 0.5 to 0.7%

• 0.7 to 0.9%

• 0.9 to 1.1%

Hand files are made from.........

• Mild steel

• Medium carbon steel

• High carbon steel

• Dead mild steel

What is the purpose of hardening?

• Refine the structure 

• Increase toughness

• Increase cutting ability

• Relieve stress and strain

Which is the fastest quenching material used in heat treatment?

• Oil

• Air

• Water

• Brine solution

Which heat treatment process increases the wear resistance of steel?

• Annealing

• Tempering

• Hardening

• Normalising