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