- | Page
Class C water license Florida Study Guide Exam Verified Answers
Question 1: Ammonia mixed with chlorine gas creates a
CORRECT ANSWER : white smoke
Question 2: The most difficult part of a water distribution
operator's job.
CORRECT ANSWER : furnish a continuous supply
Question 3: Physical connection between a safe and potentially
unsafe water source.
CORRECT ANSWER : cross connection
Question 4: A distribution system is a
CORRECT ANSWER : looped system
Question 5: Dead end mains should be flushed
CORRECT ANSWER : every month
Question 6: Excess nitrate causes a condition called
CORRECT ANSWER : blue baby syndrome
- | Page
Question 7: Water hardness is caused by
CORRECT ANSWER : calcium and magnesium
Question 8: Sewer mains should be __ft away from water mains.
CORRECT ANSWER : 9
Question 9: Water with a pH less than 7 is considered to be
CORRECT ANSWER : acidic
Question 10: Bacti records are kept for ____yrs and chemical
records are kept for ___yrs.
CORRECT ANSWER : 5, 10
Question 11: Bacti samples have to be returned to the lab within
___hrs of the collection time.
CORRECT ANSWER : 30
Question 12: Color in the water supply should be less than
_____ units.
CORRECT ANSWER : 15
- | Page
Question 13: Chlorine is ______ times heavier than air.
CORRECT ANSWER : 2.5
Question 14: 90% of underground pipe failures are related to
improper
CORRECT ANSWER : backfill and bedding
Question 15: The spoil bank should be located at least ___ft
away from the ditch.
CORRECT ANSWER : 2
Question 16: The following minimum residuals is ______mg/L
for free chlorine and ____mg/L for total chlorine.
CORRECT ANSWER : .2, .5
Question 17: Public opinion of the water utility is _______ at a
standstill.
CORRECT ANSWER : never
- | Page
Question 18: A bacti sample should be taken every ____ft of
pipe.
CORRECT ANSWER : 1000
Question 19: The most common collection point for a bacti
sample is the water tap _______.
CORRECT ANSWER : outside the house
Question 20: A standpipe is considered ground storage unless it
exceeds _____ft above the highest ________.
CORRECT ANSWER : 80, service connection
Question 21: ________ protection is the electrochemical method
for preventing ________ of metal tanks.
CORRECT ANSWER : cathodic, corrosion
Question 22: The _____ is the only cross connection control
method approved by _______.