Alloys and Their Applications

The video explains the concept of alloys, which are mixtures of metals or metals with nonmetals, and their improved properties. It covers various alloys like steel, stainless steel, brass, bronze, solder, amalgam, and duralumin, highlighting their composition, properties, and applications. Steel is made by mixing iron with carbon, while stainless steel includes chromium and nickel. Brass and bronze are copper alloys with zinc and tin, respectively. Solder, an alloy of lead and tin, is used in electronics. Amalgam, containing mercury, is used in dental fillings. Gold is alloyed for jewelry, and aluminum alloys are used in aircraft for strength and lightness.

What is the primary reason for mixing carbon with iron to form steel?

• To make it rust-resistant

• To increase its strength and hardness

• To give it a shiny appearance

• To make it more malleable

Which metals are combined with iron to create stainless steel?

• Copper and Zinc

• Chromium and Nickel

• Tin and Lead

• Silver and Mercury

What is the main advantage of brass over pure copper?

• It is more resistant to corrosion

• It is a better conductor of electricity

• It is lighter in weight

• It has a higher melting point

What is bronze primarily used for?

• Aircraft bodies

• Making electrical circuits

• Ship propellers and coins

• Jewelry

Why is solder preferred over pure lead or tin for soldering?

• It has a higher melting point

• It is more conductive

• It has a lower melting point

• It is more durable

What is an amalgam primarily used for?

• Creating electrical circuits

• Filling tooth cavities

• Constructing aircraft bodies

• Making jewelry

What is the purity of gold measured in?

• Grams

• Carats

• Ounces

• Pounds

Why is aluminum used in the construction of aircraft bodies?

• It is very strong

• It is lightweight

• It is highly conductive

• It is corrosion-resistant

What is duralumin primarily composed of?

• Aluminum and Tin

• Aluminum and Zinc

• Aluminum and Magnesium

• Aluminum and Copper

Which alloy is used for making certain instruments and aircraft bodies due to its strength and lightness?

• Bronze

• Brass

• Solder

• Magnesium