Team Trainer Exam Taken from the 2017 Northern Regional Contest held in Clymer, New York Progress Indicator: Question 5 of 30 5.  How much water should the firefighter drink every 15 to 20 minutes ideally? p. 420 Choices: 14 ounces (400 ml) 18 ounces (500 ml) 7 ounces (200 ml) 11 ounces (300 ml)