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GCSE Design and Tech
Metals and Alloys
Question | Answer |
---|---|
How does annealing affect a metal's malleability? | It increases it's malleability because it becomes softer making it easier to bend and shape. |
State what stock form of metal a manufacturer would order to make airplane wings. | Sheet |
Screws are normally permanent fixings? True or False. | False |
Galvanisation is the process of coating a metal with what material? | Zinc. It protects from rust. |
Suggest a power tool that could be used to cut a shape out of sheet metal. | A jigsaw. |
Which of these is not a property of a metal? They're not very fusible / They're thermal insulators / They're strong / They're electrical conductors. | They're thermal insulators |
Which of these is an alloy? Brass / Zinc / Tin / Aluminium | Brass (made of copper and zinc) |
Why is aluminium better for aeroplane bodies than most types of steel? | Not ferrous metal - so won't rust, less dense than steel so lightweight |
Why is tin unsuitable for making a cutting tool? | It is a soft metal and could be damaged by cutting something harder than it. Cutting tools must be harder than object cut. |
Which of these is not a ferrous metal? Cast iron / Copper / High-Carbon steel / Stainless Steel / High speed steel | Copper |
Copper is used for water pipes. Explain why? | It malleable so easily to bend into shape, rust-resistant, non-toxic. |
An artist is making a steel sculpture to put in a park. Which steel should she use? | Stainless steel, doesn't rust easily, strong and hard. |