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Introducing new Paper mode
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28 questions
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- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
What component protects the appliance from overloading which could start a fire?
Earth Wire
Neutral Wire
live wire
Fuse
battery
- Fill in the BlankPlease save your changes before editing any questions.
What colour is the live wire in a three pin plug?
- Multiple ChoicePlease save your changes before editing any questions.
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
- Fill in the BlankPlease save your changes before editing any questions.
What colour is the neutral wire in a three pin plug
- Multiple ChoicePlease save your changes before editing any questions.
What colour is the earth wire in a three pin plug
brown
Blue
Green and yellow
pink
white
- Multiple ChoicePlease save your changes before editing any questions.
Which label points to the Fuse on the diagram?
C
D
E
F
- Multiple ChoicePlease save your changes before editing any questions.
Which label points to the Live Wire on the diagram ?
A
B
C
D
- Multiple ChoicePlease save your changes before editing any questions.
Which label points to the Earth Wire on the diagram ?
A
B
C
D
- Multiple ChoicePlease save your changes before editing any questions.
Which label points to the Neutral Wire on the diagram?
A
B
C
D
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
What is the function of the neutral wire?
To increase the voltage
To complete circuit
It is a safety wire
protect the fuse
- Multiple ChoicePlease save your changes before editing any questions.
The fuse in a circuit melts when there is:
no earth wire
Too much current
direct current
Too much resistance
a loose connection
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Electricity can cause a fire.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
This is the circuit symbol of a
resistor
battery
fuse
transformer
an earth wire
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
The fuse in a circuit 'blows' when the fuse wire....
set alight
melts
explodes
cracks
falls out
- Multiple ChoicePlease save your changes before editing any questions.
what happens to a 3A fuse when the current reaches 3 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- Multiple ChoicePlease save your changes before editing any questions.
what happens to a 15A fuse when the current reaches 3 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- Multiple ChoicePlease save your changes before editing any questions.
what happens to a 30A fuse when the current reaches 2 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- Multiple ChoicePlease save your changes before editing any questions.
what happens to a 30A fuse when the current reaches 60 amps?
it sets alight
it melts
it explodes
it cracks
nothing happens
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
What component protects the user from getting electrocuted?
Earth Wire
Neutral Wire
live wire
Fuse
generator
- Multiple ChoicePlease save your changes before editing any questions.
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