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| Target
Audience |
a
particular group for whom a product or service has been designed; often
used in the media industries to describe the group of listeners or viewers |
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| Taste
Tests |
investigations
involving tasting food in order to evaluate it. Such tests
might be concerned with comparing different foods to put the foods into an
order according to a taste e.g. sweetness, or to find out if the taster
can tell the difference between similar foods. |
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| Teamwork |
working
as part of a group in which there is a shared goal. To achieve this
goal different members of the team may take on different roles |
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| Template |
a
pattern used to draw round to reproduce the same shape over and over |
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| Temporary
Joint |
a
process in which parts of a product are joined in a way which is easily
reversed e.g. nut
and bolt or velcro |
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| Tenon
Saw |
a
saw used to cut joints in wood |
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| Tensile
Strength |
the
maximum stretching force a material can withstand |
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| Tensile
Forces |
A
pulling or stretching force |
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| Testing |
investigating
a product, component or
material to find out how it performs in use |
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| Textiles |
the generic
name for any fabric material |
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| Texture |
the
way something looks or feels |
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| Thermistor |
temperature
sensitive resistors |
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| Thermoplastic |
plastics
that soften when heated, harden when cooled and try to return to their
original shape when re-heated |
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| Thermoset |
plastics
that after being heated and softened during manufacture cannot be changed
or softened again |
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| Thyristor |
an
electronic component which can be used to control both ac
and dc current.
With ac current it acts as an electronic switch. With dc current it acts
as a latch. |
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| Ties |
flexible
structural members used to resist tension forces |
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| Time
Constant |
time
taken to charge a capacitor to a specified voltage |
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| Timer |
an
electronic circuit which give a high voltage at its output for a period of
time after being triggered |
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| Time
plan |
a
chart showing when you hope to complete parts of a project |
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| Tolerance |
The
accepted degree by which parts of a product may vary from their nominal size
(the size on a design drawing). Tolerances normaly have an upper and lower
limit (eg +0.2mm and - 0.1mm). |
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| Tools |
devices
use to cut, shape, form and mix and join materials |
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| Torque |
an
applied twisting force |
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| Torsion |
a
twisting force |
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| Tough |
difficult
to break, tear or cut |
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| Toxic |
harmful
or |
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| Transistor |
A transistor is a solid
state switch. The current
being controlled enters at the collector, and leaves from
the emitter but will only do so if the base voltage is
greater than 0.7 volts. Many different types of transistor exist,
including special types like phototransistors, but the most
common are 'NPN bi-polar' types.
A transistor can also amplify
an output signal, often by several hundred times. This is
called gain (hfe) of the transistor. |
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| Translucent |
a
material that transmits light even though you cannot see through it |
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| Transparent |
a
material that you can see through |
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| Tri-Square |
a
device used for marking right angles |
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| Triangulation |
dividing
a framework into triangles to create strength and rigidity |
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TTL |
transistor
transistor logic: a method of constructing semiconductor circuits |
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