TEXAS CLASS D WATER LICENSE
PRACTICE EXAM QUESTIONS WITH
COMPLETE ANSWERS
Bacteria, algae and what are common contaminants of surface water? - Answer-
chemicals
TCEQ regulation states that septic tanks, absorption fields, sewers, manholes or
toilets cannot be within how many feet of a lake at spillway elevation or the 50-year
flood elevation? - Answer-75
TCEQ regulation states that no boat ramps, marinas, docks, or fishing piers can be
within how many feet of an intake? - Answer-1,000
TCEQ regulation states all activities shall be restricted within how many feet of an
intake? - Answer-200
Most surface water is low in minerals, gases, and? - Answer-dissolved solids
Most surface water is high in turbidity and? - Answer-algae
To protect the health of the community, treated water must be free of disease-
causing organisms and harmful chemicals must be reduced to? - Answer-safe levels
Water must be low in color, turbidity, suspended solids, temperature and free of? -
Answer-taste and odor
Colored water can be caused by organics, algae, iron, or? - Answer-manganese
Water should not be corrosive, deposit scale, or stain plumbing in order to protect
what? - Answer-consumer property
The following are characteristics of quality water: An absence of harmful chemicals,
an absence of disease-causing organisms, little or no color, turbidity , solids, odor, or
taste and noncorrosive, nonstaining and non-scale forming. - Answer-true
Treatment can include aeration, screening, chemical oxidation, coagulation,
flocculation, sedimentation, filtration, and ? - Answer-disinfection
TCEQ required treatment for surface water includes pretreatment disinfection, taste
and odor control, coagulation, sedimentation, filtration, terminal disinfection and
covered storage for what? - Answer-clear well
Pretreatment removes materials that affect treatment methods. Pretreatment
includes reservoir destratification, control of algae, debris removal, presedimentation,
aeration, chemical oxidation and activated what? - Answer-carbon adsorption
, A reservoir destratification process includes the injection of air at the bottom of the
reservoir (from spring to fall) will result in mixing to destratify the what? - Answer-lake
Deep reservoirs become stratified by temperature differences where cold water is
trapped below? - Answer-warmer water
Stratified reservoirs have problems with algae, iron and manganese, and? - Answer-
hydrogen sulfide
With enough sunlight and nutrients algae can bloom in a reservoir causing? -
Answer-taste and odor
Using copper sulfate at what dosage will assist in controlling algae blooms? -
Answer-0.1 to 0.5 mg/L
Surface water evaluations are needed on a water supply when shifts in water quality
occur such as turbidity, temperature, pH, and the presence of? - Answer-surface
water organisms
What are underground, water-bearing formations yielding useful quantities of water?
- Answer-Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of
land)? - Answer-overpumping
The purpose of the well screen is to keep out birds and? - Answer-sand
the most important feature of the well screen is the size of the? - Answer-opening
The mesh size of the screen is determined by the size of the aquifer material, the
size of the gravel in the gravel pack, and the type of well ? - Answer-development
The gravel pack is fine gravel placed around the screen to reduce pumping? -
Answer-sand
The well vent is a vacuum breaker allowing the casing to breathe as water levels
change when the pump? - Answer-cycles
All public wells must be provided with a steel sealing block, a meter, a screened
vent, and a sampling? - Answer-faucet
No source of contamination is allowed within how many feet of a public well? -
Answer-50
One way to reduce sand pumping is to decrease the pump rate and cycle? - Answer-
less
Water from a new well must not be used until bacteriological samples on three
successive days show no? - Answer-coliform
PRACTICE EXAM QUESTIONS WITH
COMPLETE ANSWERS
Bacteria, algae and what are common contaminants of surface water? - Answer-
chemicals
TCEQ regulation states that septic tanks, absorption fields, sewers, manholes or
toilets cannot be within how many feet of a lake at spillway elevation or the 50-year
flood elevation? - Answer-75
TCEQ regulation states that no boat ramps, marinas, docks, or fishing piers can be
within how many feet of an intake? - Answer-1,000
TCEQ regulation states all activities shall be restricted within how many feet of an
intake? - Answer-200
Most surface water is low in minerals, gases, and? - Answer-dissolved solids
Most surface water is high in turbidity and? - Answer-algae
To protect the health of the community, treated water must be free of disease-
causing organisms and harmful chemicals must be reduced to? - Answer-safe levels
Water must be low in color, turbidity, suspended solids, temperature and free of? -
Answer-taste and odor
Colored water can be caused by organics, algae, iron, or? - Answer-manganese
Water should not be corrosive, deposit scale, or stain plumbing in order to protect
what? - Answer-consumer property
The following are characteristics of quality water: An absence of harmful chemicals,
an absence of disease-causing organisms, little or no color, turbidity , solids, odor, or
taste and noncorrosive, nonstaining and non-scale forming. - Answer-true
Treatment can include aeration, screening, chemical oxidation, coagulation,
flocculation, sedimentation, filtration, and ? - Answer-disinfection
TCEQ required treatment for surface water includes pretreatment disinfection, taste
and odor control, coagulation, sedimentation, filtration, terminal disinfection and
covered storage for what? - Answer-clear well
Pretreatment removes materials that affect treatment methods. Pretreatment
includes reservoir destratification, control of algae, debris removal, presedimentation,
aeration, chemical oxidation and activated what? - Answer-carbon adsorption
, A reservoir destratification process includes the injection of air at the bottom of the
reservoir (from spring to fall) will result in mixing to destratify the what? - Answer-lake
Deep reservoirs become stratified by temperature differences where cold water is
trapped below? - Answer-warmer water
Stratified reservoirs have problems with algae, iron and manganese, and? - Answer-
hydrogen sulfide
With enough sunlight and nutrients algae can bloom in a reservoir causing? -
Answer-taste and odor
Using copper sulfate at what dosage will assist in controlling algae blooms? -
Answer-0.1 to 0.5 mg/L
Surface water evaluations are needed on a water supply when shifts in water quality
occur such as turbidity, temperature, pH, and the presence of? - Answer-surface
water organisms
What are underground, water-bearing formations yielding useful quantities of water?
- Answer-Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of
land)? - Answer-overpumping
The purpose of the well screen is to keep out birds and? - Answer-sand
the most important feature of the well screen is the size of the? - Answer-opening
The mesh size of the screen is determined by the size of the aquifer material, the
size of the gravel in the gravel pack, and the type of well ? - Answer-development
The gravel pack is fine gravel placed around the screen to reduce pumping? -
Answer-sand
The well vent is a vacuum breaker allowing the casing to breathe as water levels
change when the pump? - Answer-cycles
All public wells must be provided with a steel sealing block, a meter, a screened
vent, and a sampling? - Answer-faucet
No source of contamination is allowed within how many feet of a public well? -
Answer-50
One way to reduce sand pumping is to decrease the pump rate and cycle? - Answer-
less
Water from a new well must not be used until bacteriological samples on three
successive days show no? - Answer-coliform
