Snapquiz - Household Electrical Safety

This is the Snapquiz on Household Electrical Safety. Click here or use the embedded video if you haven't watched the lesson yet.

Question 1. How does a fuse protect us?

It melts when a large current flows, breaking the circuit.
It detects when a large current flows, switching off the power.
It limits large currents, only allowing a set amount of current to flow.
It predicts large currents, then disables the device.

Question 2. What is the earth wire connected to inside the appliance?

The live components of the appliance.
The neutral power connection of the appliance.
The metal case or body of the appliance.
The power switch of the appliance.

Question 3. If an appliance draws a 4A current which standard fuse value (for the UK) should be used in its plug?


Question 4. Which pin in a UK plug should connect to the fuse?

Bottom right.
Top centre.
Any - it doesn't matter.
Bottom left.

Question 5. What is the normal potential difference of the neutral wire?


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