<p> KS3</p><p>Assessment 3.3</p><p>1. What is a circuit breaker Answer: It’s like a sophisticated fuse and is designed to switch the electricity off if there is any_ problem with the circuit.______</p><p>2. What is a fuse? Answer: It is a safety mechanism designed to cut off the electricity supply if there is a fault.______</p><p>3. How does a fuse work? Answer: Fuses contain a narrow strip of wire that is designed to break if there is a fault and___ therefore cut off the electricity.______</p><p>4. Why is it important to use the correct fuse fro each appliance? Answer: For safety in order to ensure that the electric current is shut off if there is a fault. ______</p><p>5. What is a ring main? Answer: The electricity supply that runs around the house is called a ring main. It is designed in a ring and it carries mains electricity.______</p><p>6. In the spaces provided draw the electrical symbols for:</p><p>1 KS3</p><p>Assessment 3.3</p><p>7. Electricity is very dangerous. It can kill or severely hurt you. List 5 things you must never do with electricity. Potential answers: 1. Never touch a socket or switch with wet hands. 2. Never touch bare__ wires. 3. Never fiddle with the fuse box or electric meter. 4. Never touch broken plugs.____ 5. Never touch frayed insulation. 6. Never put anything other that a properly wired plug into_ an electric socket.______</p><p>8. List 3 ways of reducing the electrical consumption of your home. Potential answers: 1. Turn the lights out when you leave a room. 2. Switch the computer___ off___ when you have finished using it. 3. Don’t leave the TV on standby, always switch it off completely. 4. Don’t boil a full kettle. Only fill it with as much water as you need. 5. Don’t__ leave a battery _re-charger plugged in all the time. ______</p><p>2</p>