Oxford Cambridge and RSA Examinations A Level in Design and Technology:Design EngineeringH404/01 Principles of Design Engineering

Oxford Cambridge and RSA
Examinations


A Level in Design and Technology:Design
EngineeringH404/01 Principles of Design Engineering

, Oxford Cambridge and RSA

Wednesday 7 June 2023 – Afternoon
A Level in Design and Technology:
Design Engineering
H404/01 Principles of Design Engineering
Time allowed: 1 hour 30 minutes
* 9 8 8 9 4 6 0 9 0 4 *




You can use:
• a ruler (cm/mm)
• a scientific calculator
• geometrical instruments



* H 4 0 4 0 1 *




Please write clearly in black ink. Do not write in the barcodes.

Centre number Candidate number


First name(s)

Last name


INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. You can use extra paper if
you need to, but you must clearly show your candidate number, the centre number and
the question numbers.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.

INFORMATION
• The total mark for this paper is 80.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 20 pages.

ADVICE
• Read each question carefully before you start your answer.




© OCR 2023 [603/1131/9] OCR is an exempt Charity
DC (PQ/CGW) 328565/4 Turn over

, 2
1 This shows a USB-powered personal mini fan.


DC motor




flexible stem
fan blade




USB


(a) The flexible stem of the personal mini fan is covered with PVC. PVC is a thermo softening
polymer.

Identify two reasons why a thermo softening polymer is a suitable material for the flexible
stem.

1 ................................................................................................................................................

...................................................................................................................................................

2 ................................................................................................................................................

...................................................................................................................................................
[2]

(b) Explain why bearings are needed in mechanical systems such as those used in the personal
mini fan.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

.............................................................................................................................................. [2]




© OCR 2023

, 3
(c) The personal mini fan is powered by plugging it in to a USB socket.

Explain one benefit to the user and one benefit to the manufacturer of designing the
personal mini fan to be powered from a USB socket.

Benefit to user ..........................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

Benefit to manufacturer ............................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................
[4]




© OCR 2023 Turn over