Class C Water Operator License Exam
1) Ammonia mixed with chlorine gas creates a: white smoke
2) The most difficult part of a water distribution operator's job.: furnish a
continuous supply
3) Physical connection between a safe and potentially unsafe water
source.: cross connection
4) A distribution system is a: looped system
5) Dead end mains should be flushed: every month
6) Excess nitrate causes a condition called: blue baby syndrome
7) Water hardness is caused by: calcium and magnesium
8) Sewer mains should be __ft away from water mains.: 9
9) Water with a pH less than 7 is considered to be: acidic
10) Bacti records are kept for ____yrs and chemical records are kept
for ___yrs.: 5, 10
,. Class C Water Operator License Exam
Study online at https://quizlet.com/_lbffy
11) Bacti samples have to be returned to the lab within ___hrs of the
collection time.: 30
12) Color in the water supply should be less than _____ units.: 15
13) Chlorine is ______ times heavier than air.: 2.5
14) 90% of underground pipe failures are related to improper: backfill
and bedding
15) The spoil bank should be located at least ___ft away from the
ditch.: 2
16) The following minimum residuals is ______mg/L for free chlorine
and
17) ____mg/L for total chlorine.: .2, .5
18) Public opinion of the water utility is _______ at a standstill.: never
19) A bacti sample should be taken every ____ft of pipe.: 1000
20) The most common collection point for a bacti sample is the water
tap
, . Class C Water Operator License Exam
Study online at https://quizlet.com/_lbffy
21) _______.: outside the house
22) A standpipe is considered ground storage unless it exceeds
_____ft above the highest ________.: 80, service connection
23) ________ protection is the electrochemical method for preventing
24) ________ of metal tanks.: cathodic, corrosion
25) The _____ is the only cross connection control method approved
by
26) _______.: air gap, tceq
27) _______ on a pipeline depend on the _____ or coefficient of pipe
roughness.: friction loss, c factor
28) __________ occurs whenever there is a ______ in the velocity or
direction of water flow.: water hammer, sudden change
29) The ______ water pressure required by the rules and regulations is
____psi under any and all conditions.: minimum, 20
1) Ammonia mixed with chlorine gas creates a: white smoke
2) The most difficult part of a water distribution operator's job.: furnish a
continuous supply
3) Physical connection between a safe and potentially unsafe water
source.: cross connection
4) A distribution system is a: looped system
5) Dead end mains should be flushed: every month
6) Excess nitrate causes a condition called: blue baby syndrome
7) Water hardness is caused by: calcium and magnesium
8) Sewer mains should be __ft away from water mains.: 9
9) Water with a pH less than 7 is considered to be: acidic
10) Bacti records are kept for ____yrs and chemical records are kept
for ___yrs.: 5, 10
,. Class C Water Operator License Exam
Study online at https://quizlet.com/_lbffy
11) Bacti samples have to be returned to the lab within ___hrs of the
collection time.: 30
12) Color in the water supply should be less than _____ units.: 15
13) Chlorine is ______ times heavier than air.: 2.5
14) 90% of underground pipe failures are related to improper: backfill
and bedding
15) The spoil bank should be located at least ___ft away from the
ditch.: 2
16) The following minimum residuals is ______mg/L for free chlorine
and
17) ____mg/L for total chlorine.: .2, .5
18) Public opinion of the water utility is _______ at a standstill.: never
19) A bacti sample should be taken every ____ft of pipe.: 1000
20) The most common collection point for a bacti sample is the water
tap
, . Class C Water Operator License Exam
Study online at https://quizlet.com/_lbffy
21) _______.: outside the house
22) A standpipe is considered ground storage unless it exceeds
_____ft above the highest ________.: 80, service connection
23) ________ protection is the electrochemical method for preventing
24) ________ of metal tanks.: cathodic, corrosion
25) The _____ is the only cross connection control method approved
by
26) _______.: air gap, tceq
27) _______ on a pipeline depend on the _____ or coefficient of pipe
roughness.: friction loss, c factor
28) __________ occurs whenever there is a ______ in the velocity or
direction of water flow.: water hammer, sudden change
29) The ______ water pressure required by the rules and regulations is
____psi under any and all conditions.: minimum, 20
