Construction Industry Metals and Steel Recycling Quiz

What are ferrous metals primarily composed of?

• Copper

• Aluminum

• Iron

• Zinc

What is the first stage in the manufacture of steel?

• Convert pig iron into steel

• Produce pig iron

• Cast molten steel

• Form steel into sections or strip

Which of the following is a raw material for the production of pig iron? (multi-choice question)

• Coke

• Aluminum

• Iron ore

• Zinc

• limestone

Which of the following countries is a large producer of pig iron?

• Japan

• China

• Mexico

• South Africa

What type of steel is primarily produced using the electric arc process?

• Carbon steel

• Stainless steel

• Cast
  Iron Steel

• Iron Pig

What is a key characteristic of weathering steel?

• It is highly resistant to scratches.

• It forms a stable rust layer that protects against further corrosion.

• It is alloyed with chromium and molybdenum.

• It is used to counteract strength loss in large sections.

How does the modulus of elasticity for aluminium compare to that of steel?

• One-third

• Equal

• Twice

• Half

What must be done to an aluminium section to achieve the same stiffness as an equivalent steel member?

• Enlarge to approximately half the weight of the steel section

• Reduce to one-third the weight of the steel section

• Enlarge to twice the weight of the steel section

• Keep the same size as the steel section

What is the thickness of the natural aluminium oxide film?

• 0.01 mm

• 0.01 μm

• 0.1 μm

• 1 μm

What type of water can cause corrosion in copper pipework due to high dissolved carbon dioxide levels?

• Hard water

• Soft water

• Distilled water

• Saltwater