Quiz 3

1.

How can you identify the EARTH pin on a domestic plug?

Because it is the largest

Because it is on the left

Because it is coloured yellow
2.

What voltage is used in the home?

500

12

230
3.

When was the first Nuclear Power Station opened in the UK?

1947

1956

1986
4.

When was the first programmable computer used?

1943

1966

1981
5.

The electricity supplied by a battery is called d.c.. What does d.c. stand for?

Digital current

Direct current

Decimal current
6.

The electricity supplied in the home is called a.c.. What does a.c. stand for?

Alternating current

Automatic current

Amp current
7.

Which one of the following is NOT a reason why a.c. electricity is used in the home rather than d.c.?

The voltage of ac electricity can be easily changed

Ac electricity is safer than dc

Ac electricity can be stored and used when needed
8.

Why are electric wires covered in insulation material?

To make them look nice

To keep them warm

To stop the electricity passing to another cable or to a person
9.

Which of the following is NOT suitable as an insulating cover for electrical wires?

Polythene

Aluminium

Rubber
10.

Why are light switches in bathrooms usually 'pull cord' types rather than the more normal 'rocker' type switch?

Because they are easier to reach

Because they are safe to use if your hands are wet

Because it is difficult to fix wall tiles around normal switches.

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