1.This device is used to limit the over voltages that may occur across transformers and other electrical apparatus due to either lighting or switching surge.

2.These are the most visible component of the power transmission system.

3. These are power lines that carry the electricity to and through the grid to consumers.

4.It provides a safety margin between the high voltage lines and surrounding structures and vegetation.

5. It carries the electrical energy from the generating site to the distribution site.

6. These lines tie the load centers to one of the msny substations of the utility company.

7. A distribution system may be classified according to

8.a distributor is designed from________ consideration.

9. The point of minimum potential of uniformly loaded distributor fed at both ends with equal viltage is at.

10. This made possible ti transmit ac power at high voltage and utilize it safely.

11. These are generally small cables which connects the distributor to the consumer terminals.

12. It is the part of the power system which distributes electric power for local use.

13. All are desirable for underground distribution, except

14, A 3-wire ditribution sytem makes available _______voltages.

15. The satisfactory limit for voltage variations at the consumers terminals is

16. All are dc distributors, except

17. In a distributor fed at one end, the______ in the variuos sections of the distributor away from the feeding point

18. _______ is used at places where over-head constructions are impractical and prohibited by local laws.

19. It is a distributor arranged to form a closed loop.

20. These circuit breakers have no gas to ionize when the contacts are open and are often used in underground distribution system.

Elements of power system

Types of power lines

Basic requirements for transmission and dsitribution system