Mains Electricity

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

Question 1 of 22

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

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3. What is the electrical power for domestic consumption?

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

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5. Give the main importance of the national grid system

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

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

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

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

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

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

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

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

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14. Mention the dangers of high voltage transmission?

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

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

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

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

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

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

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

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