Class "C" Water Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
A common chemical used in the disenfection of a small water
supply is- - Correct Answers ✅Calcium Hypochlorite
A physical connection between a potable water supply and a
house well would be- - Correct Answers ✅A Cross
Connection
The amount of Chlorine in mg/L that is used by reacting with
iron, organics, or bacteria is called? - Correct Answers
✅Demand
All of the following are Physical characteristics of Chlorine
gas- - Correct Answers ✅Greenish Yellow color
Heavier than air
Pungent, Penetrating odor
Corrosive
Which of the following would be considered a part of a hypo-
chlorinator system? - Correct Answers ✅Solution feed
pump
According to state requirements, all public water supply wells
should be provided with a raised concrete sealing block,
screened vents and- - Correct Answers ✅Flow measuring
device
,Class "C" Water Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
The drawdown of a water well is determined by- - Correct
Answers ✅The difference in static and pumping levels
The pH of water indicates- - Correct Answers ✅If it is more
acidic or base
The pH of water is expressed by a scale of numbers ranging
from- - Correct Answers ✅0-14
Water that is considered neutral is expressed on the pH scale
at- - Correct Answers ✅7.0
Which of the following is a required step in collecting a
routine distribution sample for bacteriological testing? -
Correct Answers ✅Use of an approved, sterile container
Sand filtration will remove which of the following from surface
water? - Correct Answers ✅Turbidity
Activated Carbon is used in a Surface Water Plant primarily
for? - Correct Answers ✅Taste and Odor control
, Class "C" Water Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
Which of the following chemical(s) are commonly used as
coagulants in surface water treatment? - Correct Answers
✅Alum and Ferric Chloride
Ground storage tanks are required to be provided with which
of the following? - Correct Answers ✅Screened Vents
An approved locking roof hatch
An overflow pipe with hinged flap device
Annual inspection and maintenance as needed
An elevated storage tank should be protected against
corrosion by- - Correct Answers ✅Painting
Cathodic protection
Water stabilization
A public water supply system should maintain residual
pressure of 20 psi and a minimum normal operating pressure
of- - Correct Answers ✅35 psi
Before a new or repaired water line is placed into service, it
must be properly disinfected by providing a chlorine dosage
of _____ and proper detention time. - Correct Answers ✅50
mg/L
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
A common chemical used in the disenfection of a small water
supply is- - Correct Answers ✅Calcium Hypochlorite
A physical connection between a potable water supply and a
house well would be- - Correct Answers ✅A Cross
Connection
The amount of Chlorine in mg/L that is used by reacting with
iron, organics, or bacteria is called? - Correct Answers
✅Demand
All of the following are Physical characteristics of Chlorine
gas- - Correct Answers ✅Greenish Yellow color
Heavier than air
Pungent, Penetrating odor
Corrosive
Which of the following would be considered a part of a hypo-
chlorinator system? - Correct Answers ✅Solution feed
pump
According to state requirements, all public water supply wells
should be provided with a raised concrete sealing block,
screened vents and- - Correct Answers ✅Flow measuring
device
,Class "C" Water Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
The drawdown of a water well is determined by- - Correct
Answers ✅The difference in static and pumping levels
The pH of water indicates- - Correct Answers ✅If it is more
acidic or base
The pH of water is expressed by a scale of numbers ranging
from- - Correct Answers ✅0-14
Water that is considered neutral is expressed on the pH scale
at- - Correct Answers ✅7.0
Which of the following is a required step in collecting a
routine distribution sample for bacteriological testing? -
Correct Answers ✅Use of an approved, sterile container
Sand filtration will remove which of the following from surface
water? - Correct Answers ✅Turbidity
Activated Carbon is used in a Surface Water Plant primarily
for? - Correct Answers ✅Taste and Odor control
, Class "C" Water Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
Which of the following chemical(s) are commonly used as
coagulants in surface water treatment? - Correct Answers
✅Alum and Ferric Chloride
Ground storage tanks are required to be provided with which
of the following? - Correct Answers ✅Screened Vents
An approved locking roof hatch
An overflow pipe with hinged flap device
Annual inspection and maintenance as needed
An elevated storage tank should be protected against
corrosion by- - Correct Answers ✅Painting
Cathodic protection
Water stabilization
A public water supply system should maintain residual
pressure of 20 psi and a minimum normal operating pressure
of- - Correct Answers ✅35 psi
Before a new or repaired water line is placed into service, it
must be properly disinfected by providing a chlorine dosage
of _____ and proper detention time. - Correct Answers ✅50
mg/L
