TEXAS WASTEWATER CLASS D
NEWEST EXAM WITH ACTUAL
QUESTIONS AND CORRECT
ANSWERS
1mg/ 1 liter equals:
a. 8.34 lb/ 1,000,000 gals
b. 7.48 lb / 1000,000 gals
c. 3.14 g/ 1 gal
d. 17.1 grains/ 1 gram
a. 8.34 lb/ 1,000,000 gals
1ppm equals ppb
a. 10
b. 100
c. 1,000
d. 10,000
c. 1,000
Studies have shown HIV virus can not survive in the sewer systems
,a. True
b. False
b. False
Vaccinations for hepatitis B shall be made available to all exposed employees at
no-cost
a. True
b. False
a. True
The name "bar screen" or "bar rake" can be used to describe the exact same
item in a WWTF. The words are interchangeable.
a. True
b. False
b. False
A comminuted can be used in place of a manual bar screen but not an
automatic bar screen
a. True
b. False
,b. False
"Comminutors are devices that shred incoming rags and debris and leave them
in the wastewater. They are general installed in place of a bar screen."
A disadvantage of a comminutor is that the comminutor leaves shredded
debris (rags, plastic, wood, etc) in the wastewater.
a. True
b. False
a. True
The pretreatment system is generally
a. A biological process
b. A chemical process
c. A physical process
d. A physical/chemical process
e. A biological/chemical process
f. A physical /biological process
c. A physical process
A flow channel has water flowing at 2 ft/sec. The cross section of the water
measures 1.5 ft x 3 ft.
, What is the flow in cu ft/sec?
What is the flow in gallons/sec?
What is the flow in gallons/hr?
What is the flow in lines of water/day?
A Parshell Flume is used to
a. Slow down the flow to 1 ft/sec for grit removal
b. Maintain a velocity to scour the inside of pipes
c. Measure flow
d. To calculate the flow from a weir
"The head rise measurement in a Parshall flume is made two-thirds of the way
up the approach channel."
Weirs cause a head rise that can be translated into flow measurement.
a. True
b. False
a. True
"Weirs are essentially dams that that are placed across an open channel. Like
flumes, weirs cause a head rise that can be translated into flow measurement."
NEWEST EXAM WITH ACTUAL
QUESTIONS AND CORRECT
ANSWERS
1mg/ 1 liter equals:
a. 8.34 lb/ 1,000,000 gals
b. 7.48 lb / 1000,000 gals
c. 3.14 g/ 1 gal
d. 17.1 grains/ 1 gram
a. 8.34 lb/ 1,000,000 gals
1ppm equals ppb
a. 10
b. 100
c. 1,000
d. 10,000
c. 1,000
Studies have shown HIV virus can not survive in the sewer systems
,a. True
b. False
b. False
Vaccinations for hepatitis B shall be made available to all exposed employees at
no-cost
a. True
b. False
a. True
The name "bar screen" or "bar rake" can be used to describe the exact same
item in a WWTF. The words are interchangeable.
a. True
b. False
b. False
A comminuted can be used in place of a manual bar screen but not an
automatic bar screen
a. True
b. False
,b. False
"Comminutors are devices that shred incoming rags and debris and leave them
in the wastewater. They are general installed in place of a bar screen."
A disadvantage of a comminutor is that the comminutor leaves shredded
debris (rags, plastic, wood, etc) in the wastewater.
a. True
b. False
a. True
The pretreatment system is generally
a. A biological process
b. A chemical process
c. A physical process
d. A physical/chemical process
e. A biological/chemical process
f. A physical /biological process
c. A physical process
A flow channel has water flowing at 2 ft/sec. The cross section of the water
measures 1.5 ft x 3 ft.
, What is the flow in cu ft/sec?
What is the flow in gallons/sec?
What is the flow in gallons/hr?
What is the flow in lines of water/day?
A Parshell Flume is used to
a. Slow down the flow to 1 ft/sec for grit removal
b. Maintain a velocity to scour the inside of pipes
c. Measure flow
d. To calculate the flow from a weir
"The head rise measurement in a Parshall flume is made two-thirds of the way
up the approach channel."
Weirs cause a head rise that can be translated into flow measurement.
a. True
b. False
a. True
"Weirs are essentially dams that that are placed across an open channel. Like
flumes, weirs cause a head rise that can be translated into flow measurement."
