Mains Electricity

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

Question 1 of 22

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

Question 2 of 22

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

Question 3 of 22

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

Question 4 of 22

5. Give the main importance of the national grid system

Question 5 of 22

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

Question 6 of 22

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

Question 7 of 22

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

Question 8 of 22

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

Question 9 of 22

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

Question 10 of 22

11. Mention the dangers of high voltage transmission?

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12. What is the electrical power for domestic consumption?

Question 12 of 22

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

Question 13 of 22

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

Question 14 of 22

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

Question 15 of 22

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

Question 16 of 22

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

Question 17 of 22

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?

Question 18 of 22

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

Question 19 of 22

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

Question 20 of 22

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

Question 21 of 22

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

Question 22 of 22