technology 0.0 / 5 ? Design & Technology: Electronicsmanufacturing GCSECCEA Created by: ssprott621Created on: 30-04-17 14:11 What are the two classes of plastic ? thermoplastics and thermosetting plastic 1 of 19 What is the difference between the two types of plastic ? thermoplastics can be reshaped by applying heat and thermosetting plastics cannot 2 of 19 Which plastic would would you chose to protect a china ornament by post ? expanded polystyrene 3 of 19 Which plastic has the properties required for making a saucepan handle ? Melamine formaldehyde 4 of 19 What is the difference between ferrous and non-ferrous metals ? ferrous metals contains iron and is not resistant to corrosion . Non-ferrous metals do not contain iron and are resistant to corrosion . 5 of 19 What is the main advantage of using stainless steel instead of mild steel ? stainless steel is very strong and resistant to corrosion . Mild steel is not resistant to corrosion and can have impurities . 6 of 19 which tools are used to scratch lines on metal ? a scriber , an engineer's square or spring dividers 7 of 19 How can scratches on metal be made to show up more clearly ? you can wipe dye onto the surface so that you can see the line made . 8 of 19 what should you use to mark metal before you drill ? You should use a centre punch to mark onto metal before you drill because it will stop the drill from slipping . 9 of 19 What is the purpose of a chuck on a pillar drill ? it is to hold the bit into place 10 of 19 Explain what a pilot drill is used for ? a pilot drill is to provide a guide for a large hole and to stop wood from splitting . 11 of 19 What are good quality drill bits made from ? high speed steel 12 of 19 why is a pillar drill so called ? its main parts can be made to slide up and down the central pillar 13 of 19 when using a hole saw how would you prevent the wood from splitting ? When using a hole saw drill through to nearly the end and turn the wood over and drill through . 14 of 19 Explain the term plastic memory plastic memory is when you mold plastic and then reheat it , it will try and return to the original shape . 15 of 19 How can the flange be cut away from a moulding ? the flange can be cut away using a profile router . this machine uses a spinniing abrasive disc that can be set at different heights 16 of 19 why are vacum forming moulds made with drafted edges ? vacum forming moulds are made with drafted edges to make it easier to separate plastic and mould at the end . 17 of 19 what does the term CAD/CAM stand for ? computer aided design and computer aided manufacture 18 of 19 list three advantages of using CAD faster accurate drawings 19 of 19
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