Mains Electricity

1. 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 1 of 22

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

Question 2 of 22

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

Question 3 of 22

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

Question 4 of 22

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

Question 5 of 22

6. What is the electrical power for domestic consumption?

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

Question 8 of 22

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

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

Question 11 of 22

12. Give the main importance of the national grid system

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. Mention the bus bars contained in a consumer fuse box

Question 14 of 22

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

Question 15 of 22

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

Question 16 of 22

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

Question 17 of 22

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

Question 18 of 22

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

Question 19 of 22

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

Question 20 of 22

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

Question 21 of 22

22. Mention the dangers of high voltage transmission?

Question 22 of 22