Metals Theory Quiz

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Questions and Answers

Which of the following is NOT a ferrous metal?

Medium Carbon Steel

Low Carbon Steel

Cast Iron

Aluminium (correct)

Low Carbon Steel rusts easily and requires surface coating or galvanization to prevent corrosion.

True (A)

What is a disadvantage of using Duralumin in aircraft parts?

It is too lightweight.

It work hardens and can become brittle. (correct)

It is difficult to machinate.

It is not ductile.

Brass is a malleable alloy that is used in the manufacturing of musical instruments.

True (A) Signup and view all the answers

What are High Speed Steel cutting tools primarily used for?

Machining cutting tools such as drill bits, mill cutters, taps, and dies. Signup and view all the answers

Duralumin is very similar to _________ in appearance.

aluminium Signup and view all the answers

Match the alloy with its respective use:

Brass = Musical instruments and plumbing fitments Duralumin = Aircraft and vehicle parts High Speed Steel = Drill bits and milling cutters Aluminium = Packaging materials Signup and view all the answers

What is a primary advantage of recycling steel compared to making it from iron ore?

It takes 75% less energy. (D) Signup and view all the answers

Aluminium can be recycled indefinitely without losing its properties.

True (A) Signup and view all the answers

Name one use of medium carbon steel.

Garden or workshop tools Signup and view all the answers

_____ is a silvery white non-ferrous metal often used to plate steel cans.

Tin Signup and view all the answers

Match the following non-ferrous metals with their primary characteristics:

Aluminium = Lightweight and corrosion-resistant Copper = Good electrical conductor Tin = Soft and malleable Zinc = Used for galvanizing steel Signup and view all the answers

Which characteristic is NOT true for medium carbon steel?

It rusts easily. (B) Signup and view all the answers

Non-ferrous metals are magnetic and contain iron.

False (B) Signup and view all the answers

What is the primary use of zinc in construction?

Galvanizing steel to prevent rusting Signup and view all the answers

A common alloy of copper and zinc is called _____ .

Brass Signup and view all the answers

Match the following alloys with their composition:

Stainless steel = Alloy of carbon steel with chromium and nickel Brass = Alloy of copper and zinc Duralumin = Copper, magnesium, and manganese mixture Signup and view all the answers

Study Notes

Metals Theory

Ferrous Metals: These metals contain iron, ferrite, or other substances like carbon. Most are magnetic
- Low carbon steel (mild steel): Alloy of iron and 0.05-0.3% carbon.
- Cast iron: Carbon content of 2.4-4%, making it hard but brittle in thin sections. Use: kitchen pots and pans, machine bases.
- Medium carbon steel: Similar to mild steel but doesn't rust easily and keeps an edge well. Use: Tools, blades, scissors.
- High carbon steel: Alloy of iron and 0.6 - 1.5% carbon.
Non-ferrous Metals: These do not contain iron and are not magnetic
- Aluminum: Extracted from bauxite ore, 100% recyclable, light-weight, soft, ductile, malleable, good conductor, corrosion resistant, but difficult to weld. Uses: Pots, pans, car bodies.
- Copper: Light reddish-brown, polishes well, oxidizes to a green/silvery color. Malleable, ductile, good conductor, corrosion-resistant, easily joined by soldering. Uses: Plumbing supplies, electrical wire, roofing.
- Tin: Silvery white, often plated onto steel. Soft, ductile, malleable, corrosion-resistant, low melting point, good electrical conductor. Uses: Food cans (plating), soft solder, bronze.
- Zinc: Silvery grey with a bluish-white hue, matt finish. Fair electrical conductivity, malleability, and ductility; improved when alloyed with other metals. Uses: Galvanizing steel (preventing rust), galvanized screws.
Alloys: Mixtures of two or more pure metals, designed to enhance properties
- Stainless steel: Alloy of carbon steel with 13% chromium and 8% nickel. Silver hue, resists rust. Uses: Cutlery, kitchen equipment, medical equipment.
- Brass: Alloy of 65% copper and 35% zinc. Yellowish gold, oxidizes to dark brown. Malleable, easy to cast and machine, low friction. Uses: Musical instruments, plumbing, door handles, boat fittings.
- Duralumin: Alloy of 4% copper, 1% magnesium and manganese. Similar to aluminum, very lightweight and strong, ductile, malleable, excellent machining characteristics, but work-hardens (becomes hard and brittle). Uses: Aircraft parts, vehicle parts.
- High Speed Steel: Varies depending on combination of metals. Able to withstand high temperatures during machining, keeps a cutting edge well. Use: Cutting tools (drill bits, cutters, taps).

Recycling Ferrous Metals

More environmentally friendly.
Requires 75% less energy to recycle steel.
Easy to sort using electromagnets.
Approximately 50% of steel is recycled.

Metals in Commercial Packaging

Advantages:
Added security (tamper-proof).
Variety of standard sizes.
Embossing or de-bossing capabilities.
Direct printing or labeling.

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Description

Test your knowledge on ferrous and non-ferrous metals in this quiz! Explore key properties and uses of various types of metals, including steel, aluminum, and copper. Perfect for students studying metallurgy or materials science.