Test Flashcards

1
Q

Are ferrous metals magnetic?

A

Many ferrous metals, such as iron and steel, are magnetic due to their iron content

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2
Q

Do non ferrous metals contain iron?

A

Non-ferrous metals do not contain iron. They include metals like aluminum, copper, and brass

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3
Q

Are ferrous metals resistant to corrosion?

A

Ferrous metals are generally prone to rust and corrosion due to their iron content, unless treated or alloyed (e.g., stainless steel).

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4
Q

Are non ferrous metals heavier than ferrous metals?

A

Non-ferrous metals are often lighter than ferrous metals. For example, aluminum is much lighter than steel.

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5
Q

Can ferrous metals be recycled?

A

Ferrous metals can be recycled and are commonly recycled materials due to the ease of separating iron from waste using magnets.

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6
Q

What are the key points of casting and molding?

A

• Sand Casting: Molten metal poured into a sand mould.
• Injection Moulding: Molten plastic injected into a mould, used for high-volume production.
• Blow Moulding: Hot plastic inflated into a mould cavity, ideal for hollow items like bottles.

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7
Q

What are the key points of forming processes?

A

• Bending: Shaping materials by applying force, used for sheet metal.
• Forging: Shaping metal with localized compressive forces, making it stronger.
• Vacuum Forming: Heating a plastic sheet and draping it over a mould while applying a vacuum.

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8
Q

What are the key points of cutting and machining?

A

• Laser Cutting: Precision cutting using a laser, suitable for metals and plastics.
• CNC Machining: Computer-controlled cutting and shaping, includes milling and turning.
• Sawing: Cutting with saws, such as circular saws or band saws, for various materials.

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9
Q

What are the key points of joining processes?

A

• Welding: Melting and fusing metals together, used in construction and manufacturing.
• Soldering: Joining metals with a lower melting point filler metal, common in electronics.
• Riveting: Using metal pins to join materials, often in metal structures and aircraft.

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10
Q

What are the key points of additive manufacturing?

A

• 3D Printing: Layer-by-layer building from a digital model, used for prototypes and complex shapes.

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11
Q

What are the key points of finishing processes?

A

• Painting: Applying protective and decorative coatings to surfaces.
• Electroplating: Coating an object with a thin layer of metal using an electric current.
• Polishing: Creating a smooth and shiny surface, often used on metals and plastics.

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