Ohio ABC Class 1 Drinking Water Practice Exam

To convert million gallons per day (mgd) to cubic feet per second (cfs), it is essential to use the correct conversion factors.

First, understand the relationship between the units:

1 million gallons is approximately equal to 3,785.41 liters. In the case of water, 1 gallon can also be converted to cubic feet. Specifically, 1 gallon is about 0.133681 cubic feet.

With this knowledge, let's break down the conversion step by step:

1. Start with the value in mgd, which is 7.7 mgd. This means 7.7 million gallons per day.

2. Convert million gallons to gallons:

7.7 mgd = 7.7 x 1,000,000 gallons/day = 7,700,000 gallons/day.

3. Now convert gallons to cubic feet:

Multiply the gallons by the cubic feet conversion factor:

7,700,000 gallons/day × 0.133681 cubic feet/gallon = approximately 1,030,575 cubic feet/day.

4. Next, convert the daily rate into a per second rate, since there are 86,400 seconds in a day (24 hours x