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. Why might an appliance not need to use the earth wire?

It's double-insulated (non-conductive body) and low power.
It would cost more to use an earth connection.
It only needs a 3A fuse.
It uses an AC supply.

Question 2. Which pin in a UK plug should connect to the blue wire?

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

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


Question 4. How does a fuse protect us?

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

Question 5. 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.

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