When faced with a licensing exam, don't struggle with test anxiety! Use the question below and others from our Exam Study Guide series to study and prepare for exam questions. Take a look at this sample water treatment licensing question along with an explanation of the correct answer.Sample question:What chemical or chemical compound will lower pH?A) Chlorine gas
B) Calcium hypochlorite
C) Sodium hypochlorite
D) Sodium hydroxideAnswer: When chlorine gas is mixed with water a chemical reaction takes place and hypochlorous acid is formed, which lowers the pH. So, the correct answer is A.Reference: Water Treatment Plant Operation. 5th Edition, Volume ll, California State University, Sacramento. Page 80.About the author
Drew
