Mains Electricity

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

Question 1 of 22

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

Question 2 of 22

3. Give the main importance of the national grid system

Question 3 of 22

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

Question 4 of 22

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

Question 5 of 22

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

Question 6 of 22

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

Question 7 of 22

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

Question 8 of 22

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

Question 9 of 22

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

Question 10 of 22

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

Question 11 of 22

12. Mention the dangers of high voltage transmission?

Question 12 of 22

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

Question 13 of 22

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

Question 14 of 22

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

Question 15 of 22

16. 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 16 of 22

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

Question 17 of 22

18. What is the electrical power for domestic consumption?

Question 18 of 22

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

Question 19 of 22

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

Question 20 of 22

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

Question 21 of 22

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

Question 22 of 22