Test Flashcards
Are ferrous metals magnetic?
Many ferrous metals, such as iron and steel, are magnetic due to their iron content
Do non ferrous metals contain iron?
Non-ferrous metals do not contain iron. They include metals like aluminum, copper, and brass
Are ferrous metals resistant to corrosion?
Ferrous metals are generally prone to rust and corrosion due to their iron content, unless treated or alloyed (e.g., stainless steel).
Are non ferrous metals heavier than ferrous metals?
Non-ferrous metals are often lighter than ferrous metals. For example, aluminum is much lighter than steel.
Can ferrous metals be recycled?
Ferrous metals can be recycled and are commonly recycled materials due to the ease of separating iron from waste using magnets.
What are the key points of casting and molding?
• 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.
What are the key points of forming processes?
• 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.
What are the key points of cutting and machining?
• 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.
What are the key points of joining processes?
• 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.
What are the key points of additive manufacturing?
• 3D Printing: Layer-by-layer building from a digital model, used for prototypes and complex shapes.
What are the key points of finishing processes?
• 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.