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| Recycling |
reusing waste or
unwanted materials |
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| Reciprocating
Motion |
movement
backwards and forwards in a straight line |
 |
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| Regulator |
controls the
maximum pressure in a pneumatic system |
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| Reinforcement |
strengthening
or stiffening a part in a product so that it is less likely to break or
bend |
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| Relay |
a solenoid
operated switch |
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| Reliability |
the
extend to which a product performs or works consistently |
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| Renewable |
something
that can be replaced or re-grown |
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| Research |
finding out
information |
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| Resistance |
this is the opposition to current flow. it
is measured in ohms( ) |
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| Resistant
Materials |
wood, metal and
plastics |
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| Resources |
the
consumable materials, components, tools and equipment used in D&T |
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| Rigidity |
a material
property: a rigid material is one that is resistant to changes in size or
shape |
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| Risk
Assessment |
the
process by which potential risks in a practical activity are identified in
order to reduce a hazard e.g. wearing
safety spectacles to protect eyes |
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| Rotary
Motion |
turning or moving in a circle around an axis |
 |
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| Rub-down
Transfers |
prepared letters
or shapes which can be rubbed down onto paper or a similar surface |
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