The diagram shows an unsafe use of an extension cable. What is the electrical hazard?
Practical Elec WS 1 - Quiz

Quiz
•
Physics
•
10th Grade
•
Medium
Michelle Goh
Used 1+ times
FREE Resource
36 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The danger of breaking the appliances
The danger of electric fire through overheating
The danger of melting the fuses
The danger of getting electric shock
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Electrical equipment should not be used in damp conditions. What is the main hazard?
The equipment becomes too hot.
The insulation becomes damaged.
The fuses keep blowing.
The risk of an electric shock
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Five electrical appliances are connected to the same socket and there is a very large current. Why is this dangerous?
The fuses blow in the appliances.
There is a greater risk of an electrical shock.
There is overheating in each appliance.
There is overheating in the socket.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why should the metal casing of an electrical kettle be earthed?
To complete an electrical circuit
To prevent the wire from overheating
To reduce the risk of electric shocks
To prevent the casing from getting too hot to touch
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why should the metal casing of an electric heater be earthed?
to complete an electrical circuit.
to prevent the cable from overheating.
to reduce the current.
to prevent the user from getting electric shock.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the colour code of the Live, Neutral and Earth wire?
Brown, Blue, Yellow-green
Green, Yellow, Red
Blue, Brown, Yellow-green
Yellow-green, Brown, Blue
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the currents in the neutral and earth wires corresponding to a current of 4 A in the “live” wire?
4 A, 4 A
4 A, 0 A
2 A, 2 A
0 A, 4 A
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