TWUA CLASS D EXAM QUESTIONS
AND ANSWERS
What is the name of the State Agency responsible for enforcing the Safe Drinking
Water Program in Texas?
a. Texas Water Development Board
b. Texas Department of Water Resources
c. Texas Section of EPA
d. Texas Water Resource and Conservation Commission
e. Texas Commission on Environmental Quality (formally known as TNRCC) -
Answer-e. Texas Commission on Environmental Quality (formally known as TNRCC)
What minerals are associated with water hardness?
a. Chlorine and Manganese
b. Calcium and Magnesium
c. Sulfates and Chlorides
d. Carbon and Nitrogen
e. Chlorine and Hydrogen - Answer-b. Calcium and Magnesium
A public water system MUST at all times provide -
a. Adequate quantity of water
b. Adequate water pressure
c. Adequate Disinfection
d. All of the Above
e. Only a & c - Answer-d. All of the Above
A source of Groundwater would be -
a. Aquifer
b. River
c. Lake
d. Stream
e. Reservoir - Answer-a. Aquifer
. Fecal Coliform organisms sometimes found in water supplies are an indication that
-
a. The Water supply is contaminated
b. Harmful bacteria may be present
c. Possible pathogenic organisms are in the water
d. The water is unsuitable for drinking
e. All the above - Answer-e. All the above
A public water supply system should maintain a system residual pressure of 20 psi
and a minimum normal operating pressure of -
a. 35 psi
b. 40 psi
c. 45 psi
d. None of the above
AND ANSWERS
What is the name of the State Agency responsible for enforcing the Safe Drinking
Water Program in Texas?
a. Texas Water Development Board
b. Texas Department of Water Resources
c. Texas Section of EPA
d. Texas Water Resource and Conservation Commission
e. Texas Commission on Environmental Quality (formally known as TNRCC) -
Answer-e. Texas Commission on Environmental Quality (formally known as TNRCC)
What minerals are associated with water hardness?
a. Chlorine and Manganese
b. Calcium and Magnesium
c. Sulfates and Chlorides
d. Carbon and Nitrogen
e. Chlorine and Hydrogen - Answer-b. Calcium and Magnesium
A public water system MUST at all times provide -
a. Adequate quantity of water
b. Adequate water pressure
c. Adequate Disinfection
d. All of the Above
e. Only a & c - Answer-d. All of the Above
A source of Groundwater would be -
a. Aquifer
b. River
c. Lake
d. Stream
e. Reservoir - Answer-a. Aquifer
. Fecal Coliform organisms sometimes found in water supplies are an indication that
-
a. The Water supply is contaminated
b. Harmful bacteria may be present
c. Possible pathogenic organisms are in the water
d. The water is unsuitable for drinking
e. All the above - Answer-e. All the above
A public water supply system should maintain a system residual pressure of 20 psi
and a minimum normal operating pressure of -
a. 35 psi
b. 40 psi
c. 45 psi
d. None of the above
