4) The hourly variation factor is usually taken as

5) If the average daily consumption of a city is 100,000 m3, the maximum daily con¬sumption on peak hourly demand will be

6) The distribution mains are designed for

7) As compared to geometrical increase method of forecasting population, arithmetical increase method gives

8) The population of a town in three consecutive years are 5000, 7000 and 8400 respectively. The population of the town in the fourth consecutive year according to geometrical increase method is