Certification Action Line features questions and answers typical of those appearing in Water Quality Association (WQA) certification examinations. Some answers may not satisfy everyone or every condition.
1. Chlorine is a member of the ______ family.
a) alkali
b) alkaline earth
c) halogen
d) actinide
2. Chlorine has ___________ uses.
a) diverse
b) limited
3. Chlorine compounds in water form _____.
a) sodium hypochlorite
b) calcium hypochlorite
c) hypochlorous acid
d) hypochlorite ion
5. Reactions with ammonia to form chloramines can be overcome by __________.
a) chlorine gas
b) high test chlorine
c) breakpoint chlorination
10. High pH _____________ the effectiveness of chlorine dioxide disinfection and oxidation in water.
a) increases
b) decreases
c) does not affect