Q1: The ratio of minimum hourly flow to the average flow of sewage is

ANS:B - 1/3

The ratio of minimum hourly flow to the average flow of sewage varies depending on the characteristics of the sewage system and the specific conditions of the location. However, in typical sewage systems, the ratio of minimum hourly flow to the average flow of sewage often falls within the range of 1/3 to 1/4. This ratio represents the minimum hourly flow compared to the average flow in sewage systems. It's important to account for variations in sewage flow throughout the day and year. The minimum hourly flow usually occurs during periods of low water usage, such as late at night or early in the morning. Therefore, the most appropriate option from those provided would be 1/3 or 1/4. Both ratios are commonly observed in sewage systems, depending on the specific conditions and requirements of the system.