Technology Practise Metals

Metals are substances that...

• form out of mineral with one or more metallic pieces with non-metallic

• form out of metallic and ferrous pieces

• form out of carbon and iron

• form out of carbon, non-metallic pieces, ferrous pieces and metallic pieces

Mining is the process of...

• doing the metallurgy process

• obtaining the gangue and the ore

• obtaining minerals

• none of the answer are correct

Classification of metals is...

• ferrous and non-ferrous

• light, heavy and ultra-light and ferrous

Which one of the following answer is NOT a property of metals...

• electrical and acoustic conductor

• ductile and malleable

• thermal insulator

• tough and magnetic

Cast iron has a percentage of carbon...

• between 1.76% and 6.67%

• between 0.008% and 0.03%

• between 0.03% and 1.76%

• between 6.67% and 9,97%

An alloy is...

• a metal combine with carbon

• a metal combine with other metal to make it weaker

• a metal combine with iron to make it stainless steel

• a combination of two or more metals

In the steel making process the steps have the following order...

• wash and mix it, then cleaning and purification

• sieve it and mix it, purification and alloy forming

• mix it, then warm it up, purification and tempering

• wash and sieve, mix it with different materials, purification and improvement

Magnesium is an ultra-ligh metal used for...

• pyrotechnics

• aerospace industry

• bicycles

• all the options are correct

Copper is a metal used for...

• Capacitators

• filters

• pipes

• stop corrosion

Aluminium is widely know because...

• highly resistant to corrosion

• high malleability

• good electrical conductor

• very hard and strong