CLASS D WATER LICENSE – TEXAS
EXAM QUESTIONS WITH CORRECT
ANSWERS
Surface water supplies should be sampled for chemical analysis every year and
groundwater supplies should be sampled _____. - Answer-every 3 years
_____ and _____ and other minerals cause hardness in water. - Answer-Calcium
and magnesium
The pH scale ranges from _____ to _____. - Answer-0 to 14
A pH of _____ is neutral. - Answer-7 is neutral
Common gases found in water include hydrogen sulfide, carbon dioxide, methane,
and sodium chloride. (true/false) - Answer-false (sodium chloride is table salt)
Chemically, water is made of ________. - Answer-2 atoms of hydrogen and 1 atom
of oxygen
The hydrologic cycle is ________.
a. nature's way of recycling water
b. equipment used to measure distances
c. the way water filters through the earth
d. the process by which water runs into rivers and lakes - Answer-a. 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 _______.
a. swimming
b. landscape watering
c. car washing
d. firefighting - Answer-d. firefighting
Organic matter includes ________.
a. sand
b. plants, animals and humans
c. minerals
d. all listed - Answer-b. plants, animals and humans
The most important treatment process is ________, which destroys disease-causing
organisms.
a. filtration
b. disinfection
c. softening
,d. fluoridation - Answer-b. disinfection
Public water systems are required to compile a monthly report showing ________.
a. rate increases
b. accidents
c. dates of dead-end flushing
d. disciplinary action - Answer-c. dates of dead-end flushing
Most groundwater is relatively free of suspended matter, but ________ can be a
major problem in surface water. - Answer-turbidity
Color in a public water supply should be less than _____ units. - Answer-less than
15 units
Chemical characteristics of water include hardness, pH, solids, and ________. -
Answer-gases
Water is considered hard when it exceeds ________ mg/L of calcium carbonate. -
Answer-100 (may vary depending on who you talk to)
A gallon of water weighs _____ pounds and 1 mg/L equals one ________. - Answer-
water weights 8.34 pounds
1 mg/L equals one part per million
Hydrogen sulfide is heavier than air, colorless, flammable, toxic, and has a
________ odor. - Answer-rotten egg (unless you get a dose that's so heavy it numbs
your sense of smell)
Excessive nitrates in drinking water can cause ________ syndrome in infants. -
Answer-blue baby syndrome
Excessive amounts of fluoride may cause ________ or staining of teeth. - Answer-
mottling
Listen to special requests and seek solutions to oblige the customer within
________. - Answer-utility policy
Treat customers as though another water utility across the street is competing for
your ________. - Answer-customers
The molecular formula for water is _____. - Answer-H2O
Water occurs in three forms: solid ice, liquid water, and water vapor.
(true/false) - Answer-true
The _____ is the natural exchange of water between the earth and the atmosphere. -
Answer-hydrologic cycle
Average water use depends on temperature, rainfall, cost, supply, and economic
level. (true/false) - Answer-true
, Groundwater is located above the earth's surface and tapped by wells. (true/false) -
Answer-false (groundwater is below the surface)
_____ water comes from rivers, lakes, and reservoirs. - Answer-Surface
Future water supplies will become more plentiful according to the TCEQ. (true/false)
- Answer-false
Surface water or groundwater prior to treatment is called _____ water. - Answer-raw
water
_____ water means the water is free of disease-causing organisms, has a chlorine
residual, and is safe for human consumption. - Answer-Potable
_____ must be notified about changes to public water systems involving water
source, water quality, and health hazards. - Answer-The state
Before starting construction, the utility must submit engineering plans to the AWWA.
(true/false) - Answer-false (plans must be submitted to TCEQ)
Operators must keep records of water usage, system pressure, sample results,
chlorine use, repairs, and maintenance. (true/false) - Answer-true
Surface water systems must mail reports to the TCEQ in Austin by the 5th of the
following month. (true/false) - Answer-by the 10th
Water is always found pure in nature. (true/false) - Answer-false
Physical characteristics of water are temperature, turbidity, color, taste, odor, and
pH. (true/false) - Answer-false (pH is a chemical characteristic)
_____ is the amount of suspended matter such as clay, silt, organic matter, and
microorganisms in the water. - Answer-Turbidity
Color in water can result from _____ or _____. - Answer-mineral or organic matter
True color is dissolved in water (in solution) and can be removed by filtration.
(true/false) - Answer-false
Red water caused by oxidized iron is in suspension (apparent color) and cannot be
removed by filtering. (true/false) - Answer-false
Taste and odor comes from algae, bacteria, organic matter, gases, and chemicals.
(true/false) - Answer-true
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase ________ risk. - Answer-cancer
EXAM QUESTIONS WITH CORRECT
ANSWERS
Surface water supplies should be sampled for chemical analysis every year and
groundwater supplies should be sampled _____. - Answer-every 3 years
_____ and _____ and other minerals cause hardness in water. - Answer-Calcium
and magnesium
The pH scale ranges from _____ to _____. - Answer-0 to 14
A pH of _____ is neutral. - Answer-7 is neutral
Common gases found in water include hydrogen sulfide, carbon dioxide, methane,
and sodium chloride. (true/false) - Answer-false (sodium chloride is table salt)
Chemically, water is made of ________. - Answer-2 atoms of hydrogen and 1 atom
of oxygen
The hydrologic cycle is ________.
a. nature's way of recycling water
b. equipment used to measure distances
c. the way water filters through the earth
d. the process by which water runs into rivers and lakes - Answer-a. 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 _______.
a. swimming
b. landscape watering
c. car washing
d. firefighting - Answer-d. firefighting
Organic matter includes ________.
a. sand
b. plants, animals and humans
c. minerals
d. all listed - Answer-b. plants, animals and humans
The most important treatment process is ________, which destroys disease-causing
organisms.
a. filtration
b. disinfection
c. softening
,d. fluoridation - Answer-b. disinfection
Public water systems are required to compile a monthly report showing ________.
a. rate increases
b. accidents
c. dates of dead-end flushing
d. disciplinary action - Answer-c. dates of dead-end flushing
Most groundwater is relatively free of suspended matter, but ________ can be a
major problem in surface water. - Answer-turbidity
Color in a public water supply should be less than _____ units. - Answer-less than
15 units
Chemical characteristics of water include hardness, pH, solids, and ________. -
Answer-gases
Water is considered hard when it exceeds ________ mg/L of calcium carbonate. -
Answer-100 (may vary depending on who you talk to)
A gallon of water weighs _____ pounds and 1 mg/L equals one ________. - Answer-
water weights 8.34 pounds
1 mg/L equals one part per million
Hydrogen sulfide is heavier than air, colorless, flammable, toxic, and has a
________ odor. - Answer-rotten egg (unless you get a dose that's so heavy it numbs
your sense of smell)
Excessive nitrates in drinking water can cause ________ syndrome in infants. -
Answer-blue baby syndrome
Excessive amounts of fluoride may cause ________ or staining of teeth. - Answer-
mottling
Listen to special requests and seek solutions to oblige the customer within
________. - Answer-utility policy
Treat customers as though another water utility across the street is competing for
your ________. - Answer-customers
The molecular formula for water is _____. - Answer-H2O
Water occurs in three forms: solid ice, liquid water, and water vapor.
(true/false) - Answer-true
The _____ is the natural exchange of water between the earth and the atmosphere. -
Answer-hydrologic cycle
Average water use depends on temperature, rainfall, cost, supply, and economic
level. (true/false) - Answer-true
, Groundwater is located above the earth's surface and tapped by wells. (true/false) -
Answer-false (groundwater is below the surface)
_____ water comes from rivers, lakes, and reservoirs. - Answer-Surface
Future water supplies will become more plentiful according to the TCEQ. (true/false)
- Answer-false
Surface water or groundwater prior to treatment is called _____ water. - Answer-raw
water
_____ water means the water is free of disease-causing organisms, has a chlorine
residual, and is safe for human consumption. - Answer-Potable
_____ must be notified about changes to public water systems involving water
source, water quality, and health hazards. - Answer-The state
Before starting construction, the utility must submit engineering plans to the AWWA.
(true/false) - Answer-false (plans must be submitted to TCEQ)
Operators must keep records of water usage, system pressure, sample results,
chlorine use, repairs, and maintenance. (true/false) - Answer-true
Surface water systems must mail reports to the TCEQ in Austin by the 5th of the
following month. (true/false) - Answer-by the 10th
Water is always found pure in nature. (true/false) - Answer-false
Physical characteristics of water are temperature, turbidity, color, taste, odor, and
pH. (true/false) - Answer-false (pH is a chemical characteristic)
_____ is the amount of suspended matter such as clay, silt, organic matter, and
microorganisms in the water. - Answer-Turbidity
Color in water can result from _____ or _____. - Answer-mineral or organic matter
True color is dissolved in water (in solution) and can be removed by filtration.
(true/false) - Answer-false
Red water caused by oxidized iron is in suspension (apparent color) and cannot be
removed by filtering. (true/false) - Answer-false
Taste and odor comes from algae, bacteria, organic matter, gases, and chemicals.
(true/false) - Answer-true
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase ________ risk. - Answer-cancer
