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- Technology grade 7
- Term 3
- Electrical safety
- Do not touch the person.
- Send for adult help.
- Press the stop button to cut off the mains power.
- Switch off the appliance at the socket and pull out the plug.
- If this is not possible, try to push them away from the electricity. Use something made of wood which does not conduct the electricity to you.
- If you are certain that the power is off, then you can attempt to give the person first aid if you have been trained to do it.
- If you give yourself a slight electric shock you may feel weak, so relax a bit before carrying on working.
N.B.: Take good care of a person who has been injured. Keep him / her warm, let him / her lie down and call for help.
Safety measures with regard to
Scissors
- A scissors must be good quality, sharp and in good working order.
- Never let the tips of the scissors close when cutting a line greater than the length of the blades.
- When cutting curves always turn the card and not the scissors.
Craft knives
- Only to be used under very close supervision together with a metal safety ruler.
- Cut onto a suitable safety surface e.g. Very thick card/ cutting board.
- Stand when you cut and retract the blade when you need to put it away.
- The blade should not be to far out.
- You are allowed with the knife in your hand only when you are going to cut.
Drills
- You should know how to change twist drills, how to hold the hand drill and how to keep it at right angles to their work.
- The material to be drilled must be cramped securely.
- Do not remove the chuck completely as it is very difficult to reassemble.
- Select the appropriate twist drill – choosing one too small rather than one too big if in doubt.
- When drilling turn the handle in a clockwise direction and continue turning the same way when removing the drill bit from the hole.
- Hand drills are for holes up to 6mm in diameter; use a brace and bit for larger holes.
- Never leave a hand drill lying on a work top as it can so easily fall off and damage the twist drill.
Glue guns
- Must only be used under very close supervision.
- It is suitable for wood, metals and certain plastics.
- When it is switched on and not in use ensure that it is correctly positioned on its stand.
- Switch off after use.
- Be careful of glue that drips and put it away after the gun is cooled off.
General
- When sawing plastics and metals , safety spectacles should be worn, because there is a risk of eye damage.
- Some plastics become pliable when heated but care must be taken to control the temperature because the burning of plastics is dangerous as many give off poisonous fumes.
- Polystyrene should be cut with a hot wire cutter set low and used in a well ventilated room.
Soldering irons
- Soldering irons must be treated with respect. They often use mains electricity and get very hot.
The rules for correct use are as follows:
- Do not leave them switched on for possible future use. Always switch them off when not in use, because this will prolong the life of the iron.
- Never touch the mains lead with the tip of the iron. It will melt and expose bare wires which could lead to an electric shock.
- Always use a proper soldering iron stand. Failure to do so will mean that there is a risk of the hot iron setting fire to things.
- Avoid breathing in the resin fumes from the flux.
- Protect the work surface with hardboard.
Questions & Answers
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Source:
OpenStax, Technology grade 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11032/1.1
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