How alloy wheels are made

What were the original alloy wheels made of?

• Steel

• Magnesium

• Titanium

• Aluminum

What is the primary material in today's alloy wheels?

• Copper

• Magnesium

• Steel

• Aluminum

Why are aluminum alloy wheels preferred over standard steel wheels?

• They require more energy to rotate

• They are less durable

• They are heavier

• They are more attractive and lighter

At what temperature do the aluminum ingots liquefy?

• 500 degrees Celsius

• 750 degrees Celsius

• 650 degrees Celsius

• 800 degrees Celsius

What gas is injected into the molten aluminum to remove hydrogen?

• Helium

• Argon

• Nitrogen

• Oxygen

What is the purpose of adding powdered titanium and magnesium to the aluminum?

• To further strengthen the aluminum

• To make it more porous

• To change its color

• To decrease its weight

How long does it take to produce a wheel mold?

• 2 to 3 days

• 3 to 4 weeks

• 5 to 6 weeks

• 1 to 2 weeks

What is the main benefit of injecting the molten metal upward through the bottom of the mold?

• It increases the risk of air bubbles

• It reduces the risk of air bubbles

• It makes the process faster

• It requires less aluminum

What is the first step in the wheel's heat treatment process?

• Quenching in water

• Heating to 500 degrees Celsius

• Reheating to 180 degrees

• Cooling in lukewarm water

How is the wheel tested for being airtight?

• By visual inspection

• By submerging it in water while pumping air into it

• By applying pressure

• By heating it