Choose one answer.
a. be prepared by a licensed professional engineer
b. include specifications and an engineering report
c. include the problem, objectives and design details
d. all of the above
all of the above
Question 9
Marks: 1
The detention time for wastewater in a septic tank is recommended to be
Choose one answer.
a. 6 to 12 hours
b. 24 to 72 hours
c. 1 week
d. none of the above
24 to 72 hours
Question 10
Marks: 1
A storm sewer is used to
Choose one answer.
a. remove rain other standing surface water
b. remove sewage and storm water
c. remove household water waste and gutter drain water
d. remove non-toxic, non-hazardous wastewater
remove rain other standing surface water
, Question 11
Marks: 1
What is the most common method of applying wastewater to land?
Choose one answer.
a. waste stabilization pond
b. land over-land flow
c. spray irrigation
d. wetland treatment
spray irrigation
Question 12
Marks: 1
Brine from water softening units as low as ______ may inhibit bacterial action in septic tanks.
Choose one answer.
a. 1.2 percent
b. 5.6 percent
c. 8.9 percent
d. none of the above
1.2 percent
Question 13
Marks: 1
Each water quality class has a ______ standard established.
Choose one answer.
a. physical
b. chemical
c. biological
a. be prepared by a licensed professional engineer
b. include specifications and an engineering report
c. include the problem, objectives and design details
d. all of the above
all of the above
Question 9
Marks: 1
The detention time for wastewater in a septic tank is recommended to be
Choose one answer.
a. 6 to 12 hours
b. 24 to 72 hours
c. 1 week
d. none of the above
24 to 72 hours
Question 10
Marks: 1
A storm sewer is used to
Choose one answer.
a. remove rain other standing surface water
b. remove sewage and storm water
c. remove household water waste and gutter drain water
d. remove non-toxic, non-hazardous wastewater
remove rain other standing surface water
, Question 11
Marks: 1
What is the most common method of applying wastewater to land?
Choose one answer.
a. waste stabilization pond
b. land over-land flow
c. spray irrigation
d. wetland treatment
spray irrigation
Question 12
Marks: 1
Brine from water softening units as low as ______ may inhibit bacterial action in septic tanks.
Choose one answer.
a. 1.2 percent
b. 5.6 percent
c. 8.9 percent
d. none of the above
1.2 percent
Question 13
Marks: 1
Each water quality class has a ______ standard established.
Choose one answer.
a. physical
b. chemical
c. biological
