product (woodwork) Flashcards
Soldering poses what few different dangers?
The soldering iron itself gets very hot
the solder wire (the material you heat with the iron) also gets hot
occasionally you even get an air pocket or impurity that can pop as you heat the solder and send bits of solder flying.
Solder also produces strong fumes.
Always wear safety ——– when soldering.
glasses/ goggles
Never solder a —— (one that is energized).
live circuit
Solder in a —— space to prevent the mildly caustic and —– fumes from building up and causing eye or throat ———-.
well-ventilated
toxic
irritation
Always put your soldering iron back in its —– when not in use. Be sure that the stand is ——-enough or attached to your work—so that it doesn’t topple over if you brush against the —–.
stand
weighted
table
cord
—— place a hot soldering iron on your work ——-: You could start a fire.
Never
surface
Never, ever try to catch a hot ——- iron if you drop it. Let it —–, buy a new one if you have to, just don’t grab it!
soldering
fall
Give any soldered surface a ——- or two to cool down before you ——- it.
minute
touch
Never leave ——– items (such as paper) near your soldering iron.
flammable
Be sure to ——– your soldering iron when you’re not using it
unplug
- The SOLDERING IRON takes several ——- to become hot.
minutes
- Do not test the———– ———- with your finger to see if it is hot.
SOLDERING IRON
- The——– ——— becomes very hot and can cause ——-. It is important to be sensible and —– on your work while using one.
SOLDERING IRON
injury
concentrate
- Never wave the SOLDERING IRON in the air, when using it, you may cause an ——– ——–.
electric shock
- Always replace the SOLDERING IRON into the ——– between uses and never put it down on the table or the bench because it is hot and can—— the surface.
holder
burn
- Stand well back when someone else is soldering because you could—— them.
burn
- Never —— in the Technology room or you might fall over or—–into someone.
Run
bump
8.Always —– — the soldering iron after use and let it —– —— before you put it away
switch off
cool down
- Keep the tip of the hot soldering iron away from the —– flex or you could give yourself an ——.
wire
injury
Electronic components are…
Electronic components can be selected individually and put together to make a circuit. Examples of components include resistors, capacitors, diodes and transistors.
Integrated circuits are…
These are miniature circuits etched onto a piece of silicon, often called a chip, fitted inside a protective plastic package and are manufactured in large quantities.
eg as timers, counters, logic gates or operational amplifiers (op-amps).
Power supplies are…
Batteries come in all shapes and sizes. They store electrical charge and as we all know when they are put into an electronic device such as a portable radio, they provide the power.
Power supplies:
Batteries come in all shapes and sizes. They store electrical charge and as we all know when they are put into an electronic device such as a portable radio, they provide the power.
When choosing a battery, what should be considered?
The power requirements of the circuit.
The battery life needed, measured in milliamp hours.
The size, shape and weight of the battery.
The cost of the battery.
Sustainability: could rechargeable batteries be used?
Battery disposal: how will the battery be disposed of at the end of its working life?
Resistors are…
Resistors restrict or limit the flow of current in a circuit. The ability of a material or component to resist current flow is measured in ohms
What are the 3 main types of restrictors?
fixed resistors
variable resistors
special resistors, such as thermistors and light-dependent resistors (LDRs)
Fixed resistors are…
These are the most common type of resistor. They have three important uses:
protecting components
dividing voltage between different parts of a circuit
controlling a time delay
What is the unit of resistance?
The ohm is the unit of resistance. Larger values are measured in kilo-ohms (1000 ohms) and mega-ohms (1,000,000 ohms). Resistors are marked, using a code specified in British Standard 1852.
How is Resistance value shown?
Resistance value is shown by a series of coloured bands, read from left to right.
LED stands for…
Light Emitting Diode
what is a LED?
A light-emitting diode (LED) is a special kind of diode that glows when electricity passes through it. Most LEDs are made from a semiconducting material
LEDs can be bought in a range of colours. They can also be bought in forms that will switch between two colours (bi-colour), three colours (tri-colour) or emit infra-red light.
Which way do LEDs let the current pass through?
the LED will only allow current to pass in one direction. The cathode is normally indicated by a flat side on the casing and the anode is normally indicated by a slightly longer leg.
MDF
MDF or Medium-density fibreboard is a man made wood that is free from natural damages. It has a smooth sanded surface and precision finish.
fret(machine) saw.
The fretsaw is a bow saw used for intricate cutting work which often incorporates tight curves. the fretsaw is capable of much tighter and more delicate work.
chisel
A chisel is a tool with a characteristically shaped cutting edge of blade on its end, for carving or cutting a hard material such as wood, stone, or metal by hand, struck with a mallet, or mechanical power.
mallet
A mallet is a tool used for imparting force on another object, often made of rubber or sometimes wood, and usually has a relatively large head.
bench hook.
A bench hook is a workbench tool used in woodworking to hold a workpiece in place while crosscutting with a hand saw. A bench hook is a simple method used to improve accuracy and safety.
hand drill
a hand drill is a small metal blade you turn or twist in order to make a hole or mark in wood.
panel pins
small nails
belt sander
They electric tools and are used to round and shape wood by sanding them down.
tenon saw.
A Tennon saw has a relatively short blade with stability. It has hard point teeth and creates a fine finish so is ideal for carpentry as it makes a straight, precise cut.
g clamp
A G-clamp is a type of clamp device typically used to hold a wood or metal workpiece, and often used in carpentry and welding.
steel rule
A steel rule is a rule manufactured from either spring or stainless steel that feature either metric scales along its length. One end is usually flat whilst the other end (frequently including a hole for hanging) is usually round.
tri square.
A try square is special purpose square used to mark or measure material. It is shaped like a right angle.
