This class gave us some knowledge about various kinds of machinery and their functionalities. It taught us how do you know a material accurately.
- HAND JIGSAW : These are primarily used to make curved cuts, intricate cuts, straight cuts and bevel cuts in wood, plastic, sheet metal and ceramic tile.
- ALUMINIUM CUTTER : Used for plate cutting, rod cutting and angle cutting.
- DRILL MACHINE : drilling, reaming, boring, countersinking and tapping are the operations that can be performed by drill machine.
Similarly, there were other machines like :
- Spanner
- Hammer
- Screw driver (-)
- Screw driver (+)
- Plier
Categories of materials :
- Pure elements
- Compounds
- Metals
- Ceramics
- Polymers
- Semi-conductors
- Bio molecules
Properties of materials :
- Mechanical
- Thermal
- Chemical
- Magnetic
- Electric
- Optical
- Radiological
Things that we need to ask in order to know a material clearly :
- MECHANICAL
- How heavy it is?How rough it is?How tough it is?How hard it is?How strong it is?How brittle it is?
- TECHNICAL
- Does it stop heat?Is it hot or cold?How hot it is? (if hot)How cold it is? (if cold)Will it melt?What is its ignition temperature?What is its boiling/melting point?
- OPTICAL
- What is its colour?Will it absorb/reflect light?
- CHEMICAL
- Will it react to skin?
- Will it react to eyes?
- RADIOACTIVE
- Does it radiate?
- MAGNETIC
- Will it stick on fridge?
- When brought near to a magnet, will it become stronger or weaker?
With this class, we
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