Additional Mains Electricity

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  • 1/10 Questions

    The main purpose of the earth wire is:-

    • To prevent explosions
    • To prevent electric shocks
    • To prevent fires
    • To keep the appliance working
    • To complete the electric circuit
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Basic Quiz on mains electricity and safety in the home

Electricity Quizzes & Trivia

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  • 2. 

    A Cathode Ray Oscilloscope(CRO) is used to show a picture of the the changing voltage in an electrical circuit. The difference between a Direct Current(dc) and an Alternating Current(ac) is:-

    • Dc is a flat line and ac looks like a wave

    • Dc looks like a wave and ac is a flat line

    • Dc is a line up the screen and ac is a line across the screen

    • Dc is a line across the screen and ac is a line up the screen

    • Dc is a square and ac is a circle

    Correct Answer
    A. Dc is a flat line and ac looks like a wave
  • 3. 

    A 9.9kW shower heater is used with 220V mains. What current flows through the heater?

    • 0.45A

    • 4.5A

    • 45A

    • 210.1A

    • 229.9A

    Correct Answer
    A. 45A
  • 4. 

    What type of electrical appliance will have an earth wire connected to it?

    • All powerful appliances

    • All heating appliances

    • Any appliance in a plastic case

    • Any appliance in a wooden case

    • Any appliance in a metal case

    Correct Answer
    A. Any appliance in a metal case
  • 5. 

    A TV recieves 4800J of energy from 20C of charge. What is the potential difference across the TV?

    • 240V

    • 2400V

    • 4820V

    • 9600V

    • 96000V

    Correct Answer
    A. 240V
  • 6. 

    THe two key reasons why circuit breakers are used instead of fuses are:-

    • They work faster and they are cheaper

    • They work faster and they are easier to reset

    • They are cheaper and they are easier to reset

    • Fuses are expensive and it takes time to find the correct one.

    • Fuses can give off toxic fumes and are difficult to replace

    Correct Answer
    A. They work faster and they are easier to reset
  • 7. 

    A current of 12A flows through through a kettle for 5 mins while it boils some water. How much CHARGE flows through the kettle?

    • 1.4C

    • 17C

    • 60C

    • 300C

    • 3600C

    Correct Answer
    A. 3600C
  • 8. 

    You have the choice of a 1A, 3A, 5A, 10A or 13A fuse. Which one would you fit to a 1250W hair dryer to work with 250V mains?

    • 1A

    • 3A

    • 5A

    • 10A

    • 13A

    Correct Answer
    A. 10A
    Explanation
    The hairdryer needs 5A of current to work, the best fuse is the smallest value that is BIGGER than this current

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  • 9. 

    The earth wire has green and yellow stripes. This best reason for this choice is:-

    • There is no sensible colour to represent the earth.

    • The scientists could not agree on one colour

    • There were two different colours used in the previous systems

    • It allows colour blind people to identify the earth

    • The stripe looks more fashionable

    Correct Answer
    A. It allows colour blind people to identify the earth
  • 10. 

    What is the colour of the live wire and where is it connected?

    • Blue and connected to the Left pin

    • Blue and connected to the Right pin

    • Brown and connected to the Left pin

    • Brown and connected to the Right pin

    • Green and Yellow and connected to the Top pin

    Correct Answer
    A. Brown and connected to the Right pin

Quiz Review Timeline (Updated): Jul 30, 2011 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jul 30, 2011
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 14, 2010
    Quiz Created by
    Stephen Carpente
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