WATER TEST D TEXAS EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
Excessive nitrates in drinking water can cause ________ syndrome in infants. -
Answer-blue baby
Excessive amounts of fluoride may cause ________ or staining of teeth. - Answer-
mottling
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase_______ risk. - Answer-cancer
The action level for copper is 1.3 mg/L and for lead it is ________ mg/L. -
Answer-.015
Ground water usually contains more dissolved minerals and gases than surface
water, but fewer ________. - Answer-microorganisms
Water table wells are usually ________ wells. - Answer-shallow
In a water table well, the cone of depression is a ________ area around the -
Answer-dewatered
A sanitary control easement must cover land within ________ feet of a public well. -
Answer-150
Livestock and septic tanks must be no closer than ________ feet to a public well. -
Answer-50
Underground fuel tanks and septic drainage fields must be at least________ feet
from a public well. - Answer-150
Feedlots, sewage treatment plants and landfills must be at least ________ feet from
a public well. - Answer-500
A well may be developed by surging, over pumping, jetting and ________. - Answer-
backwashing
To disinfect a new well, a chlorine dosage of at least ________ mg/L of chlorine is
required. - Answer-50
A sample for physical and chemical analysis must be taken after ________ hours of
pumping. - Answer-36
, Changes in well water levels or the volume of water produced can alert the operator
to a drop in the water table, screen stoppage or damage to the ________. - Answer-
pump
Common deep well pumps include the ________ and the vertical turbine. - Answer-
submersible
Gases such as methane, carbon dioxide and hydrogen sulfide are reduced by
________. - Answer-aeration
Most surface water is low in minerals, gases and ________. - Answer-dissolved
solids
Quality water has low amounts of color, turbidity, solids and ________. - Answer-
taste and odor
Pretreatment includes lake destratification, control of algae, debris
removal,presedimentation, aeration, ________ and activated carbon adsorption. -
Answer-chemical oxidation
Copper sulfate in dosages of ________ and approved algaecides control algae
blooms. - Answer-0.1 to 0.5 mg/L
The most effective treatment for taste and odor is adsorption with ________. -
Answer-activated carbon
Lime is applied to water to ________. - Answer-adjust pH or alkalinity
Treat customers as though there was another water utility across the street
competing for your ________. - Answer-customers
Chemically, water is made of ________. - Answer-two atoms of hydrogen and one
atom of oxygen
The hydrologic cycle is ________. - Answer-nature's way of recycling water
The quality standard for public water supplies is based on the use of water
for________. - Answer-drinking
One of the most important purposes of a public water supply is________. - Answer-
fire fighting
Organic matter includes ________. - Answer-plants, animals and humans
The most important treatment process is ________, which destroys disease-causing
organisms. - Answer-disinfection
Public water systems are required to compile a monthly report showing________. -
Answer-dates of dead end flushing
QUESTIONS WITH COMPLETE
SOLUTIONS
Excessive nitrates in drinking water can cause ________ syndrome in infants. -
Answer-blue baby
Excessive amounts of fluoride may cause ________ or staining of teeth. - Answer-
mottling
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase_______ risk. - Answer-cancer
The action level for copper is 1.3 mg/L and for lead it is ________ mg/L. -
Answer-.015
Ground water usually contains more dissolved minerals and gases than surface
water, but fewer ________. - Answer-microorganisms
Water table wells are usually ________ wells. - Answer-shallow
In a water table well, the cone of depression is a ________ area around the -
Answer-dewatered
A sanitary control easement must cover land within ________ feet of a public well. -
Answer-150
Livestock and septic tanks must be no closer than ________ feet to a public well. -
Answer-50
Underground fuel tanks and septic drainage fields must be at least________ feet
from a public well. - Answer-150
Feedlots, sewage treatment plants and landfills must be at least ________ feet from
a public well. - Answer-500
A well may be developed by surging, over pumping, jetting and ________. - Answer-
backwashing
To disinfect a new well, a chlorine dosage of at least ________ mg/L of chlorine is
required. - Answer-50
A sample for physical and chemical analysis must be taken after ________ hours of
pumping. - Answer-36
, Changes in well water levels or the volume of water produced can alert the operator
to a drop in the water table, screen stoppage or damage to the ________. - Answer-
pump
Common deep well pumps include the ________ and the vertical turbine. - Answer-
submersible
Gases such as methane, carbon dioxide and hydrogen sulfide are reduced by
________. - Answer-aeration
Most surface water is low in minerals, gases and ________. - Answer-dissolved
solids
Quality water has low amounts of color, turbidity, solids and ________. - Answer-
taste and odor
Pretreatment includes lake destratification, control of algae, debris
removal,presedimentation, aeration, ________ and activated carbon adsorption. -
Answer-chemical oxidation
Copper sulfate in dosages of ________ and approved algaecides control algae
blooms. - Answer-0.1 to 0.5 mg/L
The most effective treatment for taste and odor is adsorption with ________. -
Answer-activated carbon
Lime is applied to water to ________. - Answer-adjust pH or alkalinity
Treat customers as though there was another water utility across the street
competing for your ________. - Answer-customers
Chemically, water is made of ________. - Answer-two atoms of hydrogen and one
atom of oxygen
The hydrologic cycle is ________. - Answer-nature's way of recycling water
The quality standard for public water supplies is based on the use of water
for________. - Answer-drinking
One of the most important purposes of a public water supply is________. - Answer-
fire fighting
Organic matter includes ________. - Answer-plants, animals and humans
The most important treatment process is ________, which destroys disease-causing
organisms. - Answer-disinfection
Public water systems are required to compile a monthly report showing________. -
Answer-dates of dead end flushing
