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- 1. Multiple Choice
What is wrong in this picture of a plug?
The Earth and the Live have been swapped
The Live and the Neutral have been swapped
The Neutral and the Earth have been swapped
The Earth is the wrong colour
the fuse has blown
- 2. Multiple Choice
If the earth wire is damaged or not connected properly...
The user could be electrocuted if a live wire is also loose
The appliance won't work
The appliance will overheat
The appliance will cost more to run
The user will immediately get electrocuted
- 3. Multiple Choice
What component protects the appliance from overloading which could start a fire?
Earth Wire
Neutral Wire
live wire
Fuse
battery
- 4. Fill in the Blank
What colour is the live wire in a three pin plug?
- 5. Multiple Choice
What is being described: A device that contains a thin strip of metal that melts easily if the current in the circuit is too high
Fuse
resistor
earth wire
transformer
diode
- 6. Fill in the Blank
What colour is the neutral wire in a three pin plug
- 7. Multiple Choice
What colour is the earth wire in a three pin plug
brown
Blue
Green and yellow
pink
white
- 8. Multiple Choice
Which label points to the Fuse on the diagram?
C
D
E
F
- 9. Multiple Choice
Which label points to the Live Wire on the diagram ?
A
B
C
D
- 10. Multiple Choice
Which label points to the Earth Wire on the diagram ?
A
B
C
D
- 11. Multiple Choice
Which label points to the Neutral Wire on the diagram?
A
B
C
D
- 12. Multiple Choice
What characteristic of a fuse wire is it's most important feature?
it's Boiling point
it's strength
it's Melting point
it's Texture
it's flexibility
- 13. Multiple Choice
What is the function of the neutral wire?
To increase the voltage
To complete circuit
It is a safety wire
protect the fuse
- 14. Multiple Choice
The fuse in a circuit melts when there is:
no earth wire
Too much current
direct current
Too much resistance
a loose connection
- 15. Multiple Choice
A plastic appliances like hairdryers are insulated twice because of their plastic case.
This means plastic appliances do not need....
A fuse
An earth wire
A neutral wire
A live wire
A switch
- 16. Multiple Choice
Electricity can cause a fire.
True
False
- 17. Multiple Choice
This is the circuit symbol of a
resistor
battery
fuse
transformer
an earth wire
- 18. Multiple Choice
The fuse in a circuit 'blows'when....
there is no earth wire
electrons flow too fast
the battery is too big
the resistance is too high
there is a loose connection
- 19. Multiple Choice
The fuse in a circuit 'blows' when the fuse wire....
set alight
melts
explodes
cracks
falls out
- 20. Multiple Choice
what happens to a 3A fuse when the current reaches 3 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- 21. Multiple Choice
what happens to a 15A fuse when the current reaches 3 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- 22. Multiple Choice
what happens to a 30A fuse when the current reaches 2 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- 23. Multiple Choice
what happens to a 30A fuse when the current reaches 60 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- 24. Multiple Choice
Imagine you have a circuit that is supposed to have a current of 2 amp. Which would be the best fuse to add to the circuit?
1A fuse
3A fuse
30A fuse
- 25. Multiple Choice
Imagine you have a circuit that is supposed to have a current of 2 amp. Which fuse would melt immediately if it was added to the circuit?
1A fuse
3A fuse
30A fuse
- 26. Multiple Choice
Imagine you have a circuit that is supposed to have a current of 2 amp. Which fuse would be dangerous to add to the circuit because it won't break the circuit if it overloads?
1A fuse
30A fuse
- 27. Multiple Choice
What component protects the user from getting electrocuted?
Earth Wire
Neutral Wire
live wire
Fuse
generator
- 28. Multiple Choice
Which appliances need an Earth wire?
appliances with a metal case
appliances with a plastic case
all appliances need them
appliances with high voltage
appliances with high currents
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