Which colour wire is the live wire in a 3-pin plug?
0%
Blue
0%
Yellow and green
0%
Brown
0%
Red
Q.2.
What kind of a plug is used to connect electrical appliances to a mains socket in the UK?
0%
2-pin plug
0%
3-pin plug
0%
4-pin plug
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5-pin plug
Q.3.
Most appliances have their power consumption and potential difference printed on them. Which of the following can be calculated from these values?
0%
Internal resistance of transformer
0%
Momentum
0%
Current
0%
Work done
Q.4.
Some cables for electrical appliances only have two wires within them. Which wire is missing from this configuration?
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Earth
0%
Neutral
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Live
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The red one
Q.5.
If an appliance uses mains electricity at 230 V and the service manual for the appliance recommends using a fuse of 13 A, what is the power consumption it can safely use?
0%
2020W
0%
2550W
0%
2990W
0%
3520W
Q.6.
What do electrical appliances transfer?
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Chemical energy
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Electrical energy
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Light energy
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Sound energy
Q.7.
Why do some appliances not need an earth wire?
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These appliances do not need an earth wire as they don't use electricity
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They are double insulated so that shocks cannot be caused if the appliance malfunctions
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They have been incorrectly wired
0%
All appliances need an earth wire, some do not have a neutral wire
Q.8.
What does the power of an electrical appliance represent?
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The amount of current that passes through the appliance
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The rate at which it transforms energy
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The speed at which it performs a task
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The size of voltage that the appliance uses
Q.9.
What is the main difference between a circuit breaker and a fuse?
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A circuit breaker can be used to control electrical circuits
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A circuit breaker can be reset whilst a fuse needs to be replaced
0%
A fuse can be reset whilst a circuit breaker needs to be replaced
0%
A fuse can be used to control electrical circuits
Q.10.
What size of fuse would be required for an electrical appliance which has a power rating of 600W and running off UK mains voltage at 230V?
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1 A
0%
2.5 A
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3 A
0%
5 A
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