Specialist Techniques Exam Practice (AQA Paper 1 Style)

This lesson provides exam-style questions and worked answers covering specialist techniques, processes and finishes from AQA GCSE Design and Technology (8552), Sections 3.2.8 and 3.2.9. These topics appear on Paper 1: Core Technical Principles (2 hours, 100 marks, 50% of GCSE).

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How Specialist Techniques Are Tested

Questions on specialist techniques typically appear as:

• Short-answer questions (1–2 marks) — name a tool, state a treatment, identify a process.
• Medium-answer questions (3–4 marks) — describe a process, explain a choice of tool or finish.
• Extended-response questions (6–8 marks) — compare processes, justify a surface treatment for a named product.

AQA Exam Tip: Read the question carefully. "Name" and "state" require brief answers. "Describe" requires a step-by-step account. "Explain" requires reasons/justifications. "Compare" requires similarities AND differences.

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Worked Example 1: Short Answer (2 marks)

Question: Name one advantage of using a jig when drilling holes in a batch of 50 identical components.

Model Answer: A jig guides the drill bit to the correct position each time, ensuring all 50 components have holes drilled in exactly the same location. This improves consistency and accuracy across the batch. (2 marks: one for naming the advantage, one for linking to batch production.)

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Worked Example 2: Medium Answer (4 marks)

Question: Describe how powder coating is applied to a mild steel bicycle frame.

Model Answer:

1. The bicycle frame is cleaned and degreased, often by shot blasting, to remove rust and contaminants.
2. The frame is hung on a rack and connected to an electrical earth.
3. Coloured polymer powder is sprayed onto the frame using a powder coating gun that gives each powder particle a positive electrostatic charge. The charged particles are attracted to the earthed frame and cling to the surface evenly.
4. The coated frame is placed in an oven at approximately 180–200 °C for 10–20 minutes, where the powder melts, flows together and cures to form a hard, durable, even coating.

(4 marks: one for each clearly described stage.)

AQA Exam Tip: For "describe" questions, use numbered steps and include technical details such as temperatures and processes. This shows depth of knowledge and earns higher marks.

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Worked Example 3: Extended Response (6 marks)

Question: A company manufactures a range of custom sports jerseys in batches of 100. Compare screen printing and sublimation printing as methods for adding the design. Recommend which method the company should use. Justify your answer.

Model Answer:

Factor	Screen Printing	Sublimation Printing
Process	Ink pushed through mesh screens; one screen per colour	Digital design printed on transfer paper, then heat-pressed onto polyester
Colours	Each colour requires a separate screen, increasing cost and set-up time	Full-colour, photo-quality images with no limit on colours
Durability	Ink sits ON the surface; can crack or peel after repeated washing	Dye is embedded IN the fabric; will not crack, peel or fade easily
Material	Works on cotton, polyester and blended fabrics	Only works on polyester (minimum 65%) and white/light colours
Cost at 100 units	Higher set-up cost but lower per-unit cost for simple designs	Lower set-up cost; per-unit cost is similar regardless of complexity
Customisation	Changing the design requires new screens	Each jersey can have a different name/number at no extra cost

Recommendation: Sublimation printing is the better choice for custom sports jerseys because:

• Jerseys are made from polyester, which is suitable for sublimation.
• Each jersey likely needs a different player name and number, and sublimation handles customisation with no additional set-up cost.
• The dye is embedded in the fabric, making it more durable for sportswear that is washed frequently.
• Full-colour designs (team crests, sponsor logos) are printed without extra screens.

(6 marks: 2 for comparison, 2 for recommendation, 2 for justified reasoning linked to the context.)

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Practice Questions