Explain three reasons why a designer specifies a particular grade of a material rather than naming the material alone. [3]

Assessment: Design & Technology: Product Design 9252 | Paper 1 Mock 01 | Technical, designing and making principles Subject: Design & Technology: Product Design - 9252

Question 1 Report

Explain three reasons why a designer specifies a particular grade of a material rather than naming the material alone. [3]

Answer Details

Naming only a material can be too vague because different grades have different controlled properties.

  1. Different grades can have very different strength, hardness or corrosion resistance, so the grade determines whether the component will perform as required [1].
  2. The grade affects manufacturability, for example whether it can be welded or deep drawn successfully [1].
  3. The grade affects cost, since higher-performance grades may be considerably more expensive [1].

Stating a grade also makes the specification unambiguous, so suppliers provide the same material.

Read lesson note on Selection Of Materials Or Components (OxfordAQA)
View Answer

Related Questions

1

Explain, using an example, how a designer decides which functions of a product should be automatic and which should remain under the user's control. [9]
2

A manufacturer builds a small number of products on the intended production line to prove the process before full manufacture. Name this type of run.
3

A manufacturer is deciding whether to make a product from a virgin polymer or from recycled polymer. Explain the factors the manufacturer must weigh in makin...
4

A designer uses a gear train in which a 20-tooth gear drives a 60-tooth gear. Calculate the gear ratio and state the effect on the output speed. [2]
5

Fig. 1 shows wear patterns recorded on a returned product after a year of use. Describe what this evidence tells the designer and give one change it suggests...
6

Fig. 1 shows a surface coating that repels water and dirt, based on the structure of a leaf. Name the field of design that copies solutions found in nature.
7

Explain what is meant by a tolerance, and explain how a designer decides the tolerance to place on a dimension, referring to function, cost and assembly. [10]
8

A company is introducing robots to its assembly line. Explain three effects this change will have on the workforce. [3]

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning