TEXAS CLASS C SURFACE WATER EXAM
REVIEW EXAM (RECENT EXAM) FULLY
SOLVED & UPDATED 2026 MOST
COMPLETE (2026)
A chemical commonly used to raise pH is: - correct
answer - Lime (Soda ash)
A chlorinator setting is 35 lbs/day. If the flow being
chlorinated is 1.15 MGD, the chlorine dosage is:
Formula: MGD x 8.34 x mg/L = lbs - correct answer -
3.65 mg/L (rounding)
A chlorine cylinder valve is thought to be leaking. If
ammonia vapor is passed near the valve, the presence of
a leak would be indicated by: - correct answer - White
smoke
A chlorine residual in water can be determined by using
the reagent: - correct answer - DPD - diethyl-p-
pheylenediamine
,A disease that cannot be contracted by drinking
contaminated water is: - correct answer - Malaria
A flow of 1.55 ft^3 per second is ___ gpm - correct
answer - 696 gpm
A grab sample represents the quality of the water when?
- correct answer - Only when the sample was taken
A hypochlorinator is used to feed ___ into a water supply
- correct answer - Hypochlorite solution
A major cause of pump and motor shaft coupling wear is
a: - correct answer - Misalignment between pumps and
motor flanges
A non-permit confined space by OSHA standards means a
confined space that: - correct answer - Does not contain
or have the potential to contain any hazard capable of
causing death
A pH reading of 6.0 in raw water indicates the sample is
what? - correct answer - Acidic
, A pH value of 7.0 is considered to be what? - correct
answer - Neutral
A pneumatic ejector lifts water from low points to higher
levels. The device used to achieve this is a(n)? - correct
answer - Air compressor
A pump may be damaged if it is started with the
discharge valve closed, and the pump is a(n): - correct
answer - Positive displacement pump
A sand filter will not remove: - correct answer -
Dissolved oxygen
A standpipe: - correct answer - Has a diameter less than
it's height
A valve that joins a customer's service to the water main
is called the ____ - correct answer - Corporation cock
A water storage tank must be disinfected with a dosage
of 50 mg/L. The tank is 36 feet in diameter and 20 feet
high. The amount of 65% calcium hypochlorite needed is:
REVIEW EXAM (RECENT EXAM) FULLY
SOLVED & UPDATED 2026 MOST
COMPLETE (2026)
A chemical commonly used to raise pH is: - correct
answer - Lime (Soda ash)
A chlorinator setting is 35 lbs/day. If the flow being
chlorinated is 1.15 MGD, the chlorine dosage is:
Formula: MGD x 8.34 x mg/L = lbs - correct answer -
3.65 mg/L (rounding)
A chlorine cylinder valve is thought to be leaking. If
ammonia vapor is passed near the valve, the presence of
a leak would be indicated by: - correct answer - White
smoke
A chlorine residual in water can be determined by using
the reagent: - correct answer - DPD - diethyl-p-
pheylenediamine
,A disease that cannot be contracted by drinking
contaminated water is: - correct answer - Malaria
A flow of 1.55 ft^3 per second is ___ gpm - correct
answer - 696 gpm
A grab sample represents the quality of the water when?
- correct answer - Only when the sample was taken
A hypochlorinator is used to feed ___ into a water supply
- correct answer - Hypochlorite solution
A major cause of pump and motor shaft coupling wear is
a: - correct answer - Misalignment between pumps and
motor flanges
A non-permit confined space by OSHA standards means a
confined space that: - correct answer - Does not contain
or have the potential to contain any hazard capable of
causing death
A pH reading of 6.0 in raw water indicates the sample is
what? - correct answer - Acidic
, A pH value of 7.0 is considered to be what? - correct
answer - Neutral
A pneumatic ejector lifts water from low points to higher
levels. The device used to achieve this is a(n)? - correct
answer - Air compressor
A pump may be damaged if it is started with the
discharge valve closed, and the pump is a(n): - correct
answer - Positive displacement pump
A sand filter will not remove: - correct answer -
Dissolved oxygen
A standpipe: - correct answer - Has a diameter less than
it's height
A valve that joins a customer's service to the water main
is called the ____ - correct answer - Corporation cock
A water storage tank must be disinfected with a dosage
of 50 mg/L. The tank is 36 feet in diameter and 20 feet
high. The amount of 65% calcium hypochlorite needed is:
