Mains Electricity

1. What is the electrical power for domestic consumption?

Question 1 of 22

2. Which kind of electrical appliance possess a risk of electric shock?

Question 2 of 22

3. Is it possible to step up or step down steady d.c voltage?

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4. Why are aluminum cables preferred for transmitting electrical power over a long distance?

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5. How do you reduce power losses during transmission of electricity?

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6. Which of the following is not among the items which are contained in a home consumer fuse box?

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7. Mention the dangers of high voltage transmission?

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8. Why is the cooker circuit wire very thick compared to the other circuit wires?

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9. State the difference between a fuse and a circuit breaker's?

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10. Electrical Energy = POWER x TIME and its S.I UNIT IS J/s. True or False?

Question 10 of 22

11. Mention the overall level of voltage stepped down from the national grid to a local transformer?

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12. Which type of circuit is often not earthed as a necessity?

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13. Which of the following statements is CORRECT about a fuse?

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14. Give the main importance of the national grid system

Question 14 of 22

15. A national grid is a system of power cables connecting all stations in a country to each other and finally to the consumers. True or False?

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16. Mention the bus bars contained in a consumer fuse box

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17. Mention the name of the bus bar connected to the live wire

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18. Which of the following is NOT a source of Mains electricity supply?

Question 18 of 22

19. Why is the lighting wire very thin compared to the other circuit's?

Question 19 of 22

20. From the transformer, power is brought to the house through a two wire cable; Mention them

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21. Name the electrical component used, to safe guard against excessive currents in a circuit

Question 21 of 22

22. Give the name of the bus bar to which all the neutral wires of a home consumer circuit are connected to:

Question 22 of 22