CWEA Collections Grade 3 2024 Exam|
Questions and Verified Answers| 100%
Correct| A Grade
QUESTION
Which unit uses high water pressure and a vacuum to clean sewer lines?
a. Jetter
b. Mechanical rodder
c. Combination unit
d. Bucket machine
Answer:
c. Combination unit
QUESTION
In sewer maintenance, what is a pig?
a. A ball forced through a sewer line.
b. A power rod.
c. Any foul smelling equipment.
d. The hydraulic rodding truck.
Answer:
a. A ball forced through a sewer line.
QUESTION
When pouring a concrete slab, which of the following tools is used to finish the concrete?
a. Grasshopper.
b. Tamper.
c. Trowel.
d. Vibrator.
Answer:
c. Trowel.
,QUESTION
What tool is used to snare a broken section of sewer rod?
a. Square stock corkscrew.
b. Auger.
c. Pickup tool.
d. Pull out tool.
Answer:
c. Pickup tool.
QUESTION
Why is the replacement of wastewater collection systems in some downtown streets difficult?
a. Crowding of other underground utilities.
b. Records have not been maintained properly and the collection system is lost.
c. Some people have landscaped their backyards over the collection system and do not want their
yards dug up.
d. The streets will have to be paved again
Answer:
a. Crowding of other underground utilities.
QUESTION
How can the velocity of water flowing in a sewer be estimated?
a. Driving between manholes and reading the speedometer.
b. Measuring the Manning's roughness coefficient for the sewer.
c. Measuring the time it takes for the dye to be carried by the wastewater between the two
manholes.
d. Measuring the time it takes to run between the two manholes.
Answer:
c. Measuring the time it takes for the dye to be carried by the wastewater between the two
manholes.
QUESTION
Drawings which are considered "As Built" would be?
, a. Construction drawings issued to the contractor.
b. Corrected construction drawings showing changes made in the field installation.
c. Detailed drawings of proposed construction.
d. Sectional maps on file.
Answer:
b. Corrected construction drawings showing changes made in the field installation.
QUESTION
In lieu of a shorting system, the sides or the walls of an excavation, or trench, may be:
a. sloped 3:1.
b. sloped 1:3.
c. sloped 2:1.
d. sloped 1:1.
Answer:
a. sloped 3:1.
QUESTION
When a water main must be laid under a sewer main, the sewer pipe must be:
a. lined with epoxy.
b. cleaned carefully.
c. replaced with water type pipe with pressure tight joints.
d. taken out while the water main is being installed.
Answer:
c. replaced with water type pipe with pressure tight joints.
QUESTION
Hydrogen peroxide controls odors in sewers by:
a. decreasing the dissolved oxygen.
b. neutralizing the PH.
c. oxidizing sulfide compounds.
d. providing a source of hydrogen ions.
Questions and Verified Answers| 100%
Correct| A Grade
QUESTION
Which unit uses high water pressure and a vacuum to clean sewer lines?
a. Jetter
b. Mechanical rodder
c. Combination unit
d. Bucket machine
Answer:
c. Combination unit
QUESTION
In sewer maintenance, what is a pig?
a. A ball forced through a sewer line.
b. A power rod.
c. Any foul smelling equipment.
d. The hydraulic rodding truck.
Answer:
a. A ball forced through a sewer line.
QUESTION
When pouring a concrete slab, which of the following tools is used to finish the concrete?
a. Grasshopper.
b. Tamper.
c. Trowel.
d. Vibrator.
Answer:
c. Trowel.
,QUESTION
What tool is used to snare a broken section of sewer rod?
a. Square stock corkscrew.
b. Auger.
c. Pickup tool.
d. Pull out tool.
Answer:
c. Pickup tool.
QUESTION
Why is the replacement of wastewater collection systems in some downtown streets difficult?
a. Crowding of other underground utilities.
b. Records have not been maintained properly and the collection system is lost.
c. Some people have landscaped their backyards over the collection system and do not want their
yards dug up.
d. The streets will have to be paved again
Answer:
a. Crowding of other underground utilities.
QUESTION
How can the velocity of water flowing in a sewer be estimated?
a. Driving between manholes and reading the speedometer.
b. Measuring the Manning's roughness coefficient for the sewer.
c. Measuring the time it takes for the dye to be carried by the wastewater between the two
manholes.
d. Measuring the time it takes to run between the two manholes.
Answer:
c. Measuring the time it takes for the dye to be carried by the wastewater between the two
manholes.
QUESTION
Drawings which are considered "As Built" would be?
, a. Construction drawings issued to the contractor.
b. Corrected construction drawings showing changes made in the field installation.
c. Detailed drawings of proposed construction.
d. Sectional maps on file.
Answer:
b. Corrected construction drawings showing changes made in the field installation.
QUESTION
In lieu of a shorting system, the sides or the walls of an excavation, or trench, may be:
a. sloped 3:1.
b. sloped 1:3.
c. sloped 2:1.
d. sloped 1:1.
Answer:
a. sloped 3:1.
QUESTION
When a water main must be laid under a sewer main, the sewer pipe must be:
a. lined with epoxy.
b. cleaned carefully.
c. replaced with water type pipe with pressure tight joints.
d. taken out while the water main is being installed.
Answer:
c. replaced with water type pipe with pressure tight joints.
QUESTION
Hydrogen peroxide controls odors in sewers by:
a. decreasing the dissolved oxygen.
b. neutralizing the PH.
c. oxidizing sulfide compounds.
d. providing a source of hydrogen ions.
