Plastic patio chair

Cast non-ferrous chair

Look at the three chairs above. Give two reasons why someone would wish to buy a) the wooden chair b) the plastic chair c) the metal chair. (6 Marks)

The wooden chair is made from a renewable resource and the metal chair from recycled materials. Explain what is meant by a renewable resource. Explain what is meant by a recycled material. (4 Marks)

Sketch the symbol which shows a product is made from recycled materials.(2 Marks)

The metal chair has been cast using the sand casting method and the plastic chair has been made using the injection moulding process. Use simple diagrams to explain ONE of these processes, marks to be awarded for quality of sketches, quality of explanation.( 12 Marks)

Name a softwood that you could make the wooden folding chair from. (1 Mark)

The pieces of wood for the chair seat are each 450mm X 75mm X 15mm. Using notes and diagrams show how you could cut 500 of these pieces so that they were exactly the same length. (3 Marks)

Each piece of wood has two holes drilled in it. Design a jig which will accurately locate and hold the piece of wood for drilling. (8 Marks)

Each hole needs countersinking as shown below. How would you make sure that each of the countersinks were exactly the same size/depth? (2 Marks)                                                                                              

Why do the holes need to be countersunk? (1 Mark)