Quiz about Mains Electricity

Question 1

In a plug, what colour is the live wire?

Accepted Answer

Brown

Answer

Blue

Answer

Green & Yellow

Question 2

In a plug, what colour is the neutral wire?

Accepted Answer

Blue

Answer

Green & Yellow

Answer

Brown

Question 3

In a plug, what colour is the earth wire?

Accepted Answer

Green & Yellow

Answer

Blue

Answer

Brown

Question 4

What wire is label 2?

Accepted Answer

Neutral Wire

Answer

Live Wire

Answer

Earth Wire

Question 5

What wire is label 1?

Accepted Answer

Earth Wire

Answer

Live Wire

Answer

Neutral Wire

Question 6

What wire is label 4?

Accepted Answer

Live Wire

Answer

Neutral Wire

Answer

Earth Wire

Question 7

What is the national grid?

Accepted Answer

A system of cables and transformers linking power stations to consumers

Answer

A wire which links houses to other houses

Answer

How electricity gets from where it is made into your house

Answer

A system of cables and pylons that link hospitals and houses

Question 8

What is Transformer A?

Accepted Answer

Step Up Transformer

Answer

Step Down Transformer

Question 9

What is Transformer B?

Accepted Answer

Step Down Transformer

Answer

Step Up Transformer

Question 10

Why does a step up transformer increase thevoltage?

Accepted Answer

To reduce the energy lost due to heating

Answer

To increase the power

Answer

To increase the current

Question 11

In the UK the three wires in a three-core cable are always the same colours.

Why are the wires always the same colours?

Accepted Answer

It is easy to identify each wire

Answer

Each wire is made by a different company.

Answer

They are cheaper to manufacture.

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