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. An effect of lead in drinking water may be _______.
a) respiratory disease
b) acute gastrointestinal illness
c) reduced IQ levels in children
d) lung cancer

2. The letters or units “SCFH” appearing in ozonation literature mean _______.
a) slow cooling from heat
b) standard cubic feet per hour
c) stable cubic feet per hour
d) safe chemical for handling

3. A probable cause of a pinging or popping sound coming from a pump may be_____.
a) cavitation
b) water hardness
c) descaling
d) bad bearing

4. Moderately hard water will have a hardness range of _______.
a) 1.0 to 3.5 grains per gallon (gpg)
b) 3.5 to 7.0 gpg
c) 7.0 to 10.5 gpg
d) 10.5 gpg and above

5. Water hardness may be expressed in _______.
a) gallons per minute
b) cubic feet per second
c) milliliters per liter as CaCO3
d) milligrams per liter as CaCO3

6. One grain per gallon equals _______ milligrams per liter and _______ parts per million.
a) 7,000, 7,000
b) 7,000, 17.1
c) 17.1, 7,000
d) 17.1, 17.1

7. The following method(s) is/are most effectively used to remove high iron content from a well water supply:
a) feed acetic acid
b) retain until it settles out
c) oxidation followed by filtration
d) reverse osmosis

8. 21° on the Centigrade scale is equal to _______ Fahrenheit.
a) 70°
b) 50°
c) 80°
d) 100°

9. Metal water pipe is most likely to corrode in _______.
a) high pH conditions
b) decarbonated water
c) oxygenated water
d) water with polyphosphates

10. A health risk associated with nitrates in drinking water is _______.
a) cancer
b) “blue baby” syndrome
c) high blood pressure
d) nervous system disorders