AQA 2023 A-level DESIGN AND TECHNOLOGY: PRODUCT
DESIGN 7552 Paper 1 & 2 Question Papers & Mark
schemes
Work hardening - ANSWERSForms metals at colder
... [Show More] temperatures to improve
hardness and tensile strength and is reversed by annealing
Annealing - ANSWERSUses heat to make metals easier to work with by heating
metal then cooling slowly
case hardening - ANSWERSHardening of the outer surface (or case) of a steel
component by a carburizing then dipping in carbon powder then heated
hardening - ANSWERSHeats medium to alter structure quenched in water,oil or
saltwater quenching +hardening improves hardness and increases brittleness
Soldering - ANSWERSCleaned+degreased
Joint area clamped
Heated up to melting point of filler/solder
Solder added
Metal cleaned to remove flux residue
Pressure treating - ANSWERSA wood finish which protects wood from rotting and
insect attack by placing wood in pressure vessel and using a vacuum and pressure
to force copper preservative deeeeeeeeeeep into the wood
Where is soldering used - ANSWERSIn joining precious metals (hard soldering)
Plumbing and electronics (soft soldering)
Rolling - ANSWERS
Tempering - ANSWERSUsed for mcs +Hcs decreases hardness and increases
toughness. Reduced hardness improves ductility and reduces brittle ness
Works by heating metal to below critical point then it is air cooled
What is modular/cell production - ANSWERSCarries out sequence of cnc processes
to carry out a range of different tasks
What is sub assembly and standardised components - ANSWERSSub assembly is
created as a unit before being combined e.g. bike
Standardised components must fit other elements of a design e.g. lightbulb
What is a master production system - ANSWERSPlan that determines how many
products will be made in a given time
What is Embossing/Debossing? - ANSWERSWhen surface is raised/indented to
create good visual effect and uses 2 dies and forms area under pressure and ink can
be applied
AQA 2023 A-level D [Show Less]