Cambridge A Level Design and Technology 9705 — 2014 Oct/Nov Paper 3 · Variant 1

This document consists of 9 printed pages and 3 blank pages. DC (LK/AR) 85707/2 © UCLES 2014 [Turn over Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level * 6 1 8 0 9 1 9 0 0 7 * DESIGN AND TECHNOLOGY 9705/31 Paper 3 October/November 2014 3 hours Additional Materials: Answer Booklet/Paper A range of design drawing equipment A3 Drawing Paper (5 sheets) READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Section A Answer two questions from one of the Parts A, B or C. Section B Answer one question. All dimensions are in millimetres. The instruction ‘discuss’ denotes that you should: • examine critically the issues raised by the question; • explain and interpret these issues as appropriate; • introduce evidence wherever possible to support conclusions of arguments. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.

2 9705/31/O/N/14 © UCLES 2014 Section A Answer two questions from one of the Parts A, B or C. Part A – Product Design 1 Fig. 1 shows a garden bird feeder with details of the cover. cover Sectional view of cover 45 Ø8 hole Fig. 1 (a) State a suitable material for a cover of the type shown in Fig. 1 and give two reasons for your choice. [3] (b) Describe, using notes and sketches, how you would make the cover. [9] (c) Explain what changes may be necessary to the design, the manufacturing method used and the material selected, if 1000 covers were required. Use notes and sketches to support your answer. [8]

3 9705/31/O/N/14 © UCLES 2014 [Turn over 2 Frank Chimera, a designer, states “People ignore design that ignores people”. Discuss the issues raised by this statement and the implications for product designers and those involved in the design industry. [20] 3 item: guitar side process: laminated item: tube process: extrusion item: kayak process: rotational moulding Fig. 2 Choose two of the items shown in Fig. 2 and for each: (a) use notes and sketches to describe the manufacture of the item using the process given; [7  2] (b) explain why the process is particularly suitable for the production of the item. [3  2]

4 9705/31/O/N/14 © UCLES 2014 Part B – Practical Technology 4 Name a specific product or component that makes use of the following properties. Explain why the properties are appropriate. • Toughness • Elasticity • Thermal conductivity • Corrosion resistance Use a different product or component for each answer. Include details of the function of the product and specific materials used where appropriate. [4  5] 5 Fig. 3 shows details of a connecting link for a high speed engine. 120 Fig. 3 The connecting link could be manufactured in the following methods: • machined and welded; • forged; • pressed and stamped; • die cast. Select two of the methods listed above and compare and contrast their suitability for the manufacture of the connecting link. Consider cost and time factors and include details of the manufacturing methods and specific materials used. Use annotated sketches where appropriate to support your answer. [20]

5 9705/31/O/N/14 © UCLES 2014 [Turn over 6 (a) Explain the working of the following components: • photodiode; • thermistor; • relay. [3  3] (b) Fig. 4 shows a circuit for sensing moisture using a 741 Op-amp. 100 k1 100 k1 PROBES − + 2 7 6 3 4 2201 RED GREEN +9 V 0 V −9 V Fig. 4 (i) Explain how the circuit operates. [5] (ii) Make an annotated sketch of the casing for the circuit that would make it suitable for use by football and rugby referees to check if grass playing surfaces are too wet to play on safely. [6]

6 9705/31/O/N/14 © UCLES 2014 Part C – Graphic Products 7 Discuss the importance of the use of 2D and 3D modelling to: • architects; • graphic designers; • product designers. [20] 8 Fig. 5 shows a development (net) for packaging to be used by a fast food outlet. Fig. 5 (a) The package will be printed on the outside, and will contain burgers, french fries and other food items. State a specific suitable material for the packaging and give two reasons for your choice. [4] (b) Describe, using notes and sketches, how the packaging would be produced as a batch of 1000. Include full details of the manufacturing and printing methods used. [16]

7 9705/31/O/N/14 © UCLES 2014 [Turn over 9 Fig. 6 shows details of a cast component. A R14 R20 10 R32 hole R18 160 25 10 30 X A Fig. 6 (a) Draw full size: • a plan viewed from arrow X; • a sectional elevation on AA. Fully dimension the drawing. [14] (b) Explain the advantages of using a CAD (Computer Aided Design) system to draw components. [6]

8 9705/31/O/N/14 © UCLES 2014 Section B Answer one question on the A3 paper provided. You should approach the design question of your choice in the following manner: Analysis Produce an analysis of the given situation/problem, which may be in written or graphical form. [5] Specification From the analysis produce a detailed written specification of the design requirements. Include at least five specification points other than those given in the question. [5] Exploration Use bold sketches and brief notes to show your exploration of ideas for a design solution, with reasons for selection. [25] Development Show using bold sketches and notes, the development, reasoning and composition of ideas into a single design proposal. Give details of materials, constructional and other relevant technical details. [25] Proposed solution Produce drawings of an appropriate kind to show the complete solution. [15] Evaluation Give a written evaluation of the final design solution. [5] [Total: 80]

9 9705/31/O/N/14 © UCLES 2014 10 Cycling is an increasingly popular sport and pastime. Bicycles need regular servicing and maintenance to ensure that they are working effectively and that they are safe to use. You are to design a product that will hold a bicycle securely whilst servicing and maintenance is being carried out. The product must: • be freestanding; • take up minimum space for storage. 11 Many people, including the elderly and very young children, can be at risk during very cold weather. You are to design a product that will clearly indicate that the temperature has fallen below a safe level in a room. The product must: • have an adjustable temperature setting; • include an audible and visual alarm to indicate that the temperature has fallen below the set level. 12 Design a product to hold Graphics equipment to enable a student to work at school and at home. The product must: • hold up to 30 sheets of A3 paper; • include secure storage space for basic Graphics equipment.

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12 9705/31/O/N/14 © UCLES 2014 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. BLANK PAGE

® IGCSE is the registered trademark of Cambridge International Examinations. CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International Advanced Level MARK SCHEME for the October/November 2014 series 9705 DESIGN AND TECHNOLOGY 9705/31 Paper 3, maximum raw mark 120 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge will not enter into discussions about these mark schemes. Cambridge is publishing the mark schemes for the October/November 2014 series for most Cambridge IGCSE®, Cambridge International A and AS Level components and some Cambridge O Level components.

Page 2 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 Section A Part A – Product Design 1 (a) suitable material including: – PVC – Mild steel (plated) – Aluminium – ABS – Acrylic – Appropriate hardwood [1] reasons including: – Easy to turn/mould – Even dome shape created – Suitable for outdoor use – Aesthetic qualities – Lightweight, easy to form 2 × 1 [3] (b) quality of description: – fully detailed 3 – 7 – some detail, 0 – 2 quality of sketches up to 2 [9] (c) explanation could include: – change in process; – change in materials; – use of jigs, formers, moulds; – simplification of design. quality of explanation: – logical, structured 4 – 6 – limited detail, 0 – 3 – quality of sketches up to 2 [8] [Total: 20]

Page 3 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 2 Discussion could include: – anthropometrics/ergonomics – market research – marketing/advertising – legislation and standards – inclusion Examination of issues – wide range of relevant issues 5 – 9 – limited range 0 – 4 Quality of explanation – logical, structured 4 – 7 – limited detail, 0 – 3 Supporting examples / evidence – User testing – Specific anthropometric examples – questionnaires – specific promotion [4] [Total: 20] 3 (a) description of process – fully detailed 3 – 5 – some detail, 0 – 2 – quality of sketches up to 2 (7 × 2) [14] (b) laminating – little wastage – strong, can keep shape – easily repeated Extrusion – no wastage – exceptionally quick/consistent standard of section – grain structure enhanced Rotational moulding – large hollow shape – excellent finish – minimal wastage – exact amounts used – quick one piece production 3 × 2 [6] [Total: 20]

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Page 5 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 (b) (i) When probes dry, voltage into pin 3 high, positive output, red LED on. When probes wet, input into pin 3 lower than pin 2, negative output, green LED on. Variable resistor sets sensitivity, 220 Ω resistor protects LEDS Quality of explanation: – full detail of operation of circuit 3 – 5 – limited detail 0 – 2 [5] (ii) Appropriate casing showing probes, switch(es), battery cover 4 Quality of communication 2 [6] [Total: 20]

Page 6 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 Part C – Graphic Products 7 Discussion could include: – explore ideas – show clients – test 3D views – scale/proportion – trial working/assembly systems – allow ‘hands on’ analysis/evaluation Examination of issues – wide range of relevant issues 5 – 9 – limited range 0 – 4 Quality of explanation – logical, structured 4 – 7 – limited detail, 0 – 3 Supporting examples/evidence – sketching/exploring – model mechanisms/ – scaled proposals [4] [Total: 20] 8 (a) suitable material e.g.: – starch based/ plant based biodegradable card – poly coated paperboard – food grade ivory board 1 mark for card, 2 marks for specific card 2 Reasons – easy to cut/fold – accept print – withstand spillage – two appropriate reasons 2 [4] (b) quality of description: – fully detailed including presse form/print 10 – 14 – some detail, could include one off production 5 – 9 – limited detail, basic stage/s only 0 – 4 – quality of sketches up to 2 [16] [Total: 20]

Page 7 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 9 (a) full front elevation 4 correct sectional elevation 5 correct projection 1 fully dimensioned 2 quality of line 2 [14] (b) explanation could include: – speed – accuracy – ease of storage – communicating ideas Quality of explanation – logical, structured 4 – 6 – limited detail 0 – 3 [6] [Total: 20]

Page 8 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014

Page 9 Mark Scheme Syllabus Paper Cambridge International A Level – October/November 2014 9705 31 © Cambridge International Examinations 2014 Section B Analysis Analysis of the given situation/problem. [5] Specification Detailed written specification of the design requirements. At least five specification points other than those given in the question. [5] Exploration Bold sketches and brief notes to show exploration of ideas for a design solution, with reasons for selection. – range of ideas [5] – annotation related to specification [5] – marketability, innovation [5] – evaluation of ideas, selection leading to development [5] – communication [5] Development Bold sketches and notes showing the development, reasoning and composition of ideas into a single design proposal. Details of materials, constructional and other relevant technical details. – developments [5] – reasoning [5] – materials [3] – constructional detail [7] – communication [5] Proposed solution Produce drawing/s of an appropriate kind to show the complete solution. – proposed solution [10] – details/dimensions [5] Evaluation Written evaluation of the final design solution. [5] [Total: 80]