CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
"High priority subsurface installations ae high pressure natural gas pipelines with
normal operating pressures greater than 415 kPa gauge, petroleum pipelines,
conductors or cables that are potentially hazardous to employees, or the public, if
damaged." This paragraph indicates that before the start date of an excavation,
what should occur? - ansAn agreed upon site visit
550 gallons of sewage overflow and do not reach any surface waters. What category
of overflow is this? - ansCategory 3
A flow of 650 pgm would be how many mgd? - ans0.936
A hazard that may damage a TV camera going through a sewer is: - ansan offset joint
A person who completes a training program in accordance with the requirements of
Title 8, Calif. Code of Regulations, Minimum Guidelines of the Common Ground
Alliance is considered a ______________ person - ansQualified Person
According to the State Water Resources Control Board Order No. 2006-003-DWQ,
each enrollee must develop and implement a system-specific: - ansSSMP (Sewer
System Management Plan)
After completing a Temporary Traffic Control setup for your work zone it is a good
practice to: - ansObserve how effective your TTC setup is working to control traffic
and make the necessary changes
Based on new Best Practices of the Common Ground Alliance for marking
underground Utilities, the Inquiry Identification Number for an Underground Service
Alert (USA) is viable for how many days? - ans28 days
Before starting a maintenance operation in a basement located in the backyard of a
residence you should: - anscontact the resident and politely ask permission to enter
their backyard
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause: -
ansodors
Clear water in entering a collection system is called what? - ansinfiltration
emergency stoppages in pipelines may be cleared safely by use of: - anshigh velocity
cleaners
Flatter sewer line grades may cause added sewer maintenance expense and odor
nuisance. This is caused by what? - ansA decrease in velocity which allows organic
,CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
and inorganic solids to settle out. This, in turn, allows biological activity to happen
which corrodes the pipe and releases hydrogen sulfide (H2S) which smells like rotten
eggs
For a nighttime Short Term Stationary Traffic Control Zone setup on low speed/ low
volume street, the minimum height of the traffic cones used shall be ________ - ans28
inches
How can the members of a balling crew communicate with each other? - ansHand
Signals
How high do your traffic cones need to be if the speed limit around your work zone is
35 MPH? - ans18". Cone height must be 18" if speed limit is 30 MPH or less and 28" if
the speed limit is 45 MPH or more
How long do you have to report a category 1 SSO? - ans2 hours
How long do you have to report a category 2 or 3 SSO? - ans3 days
how many flaggers are REQUIRED to perform a basic flagging operation? - ansone
How many types of common shoring are there? - ans6
How often must an excavation site and adjacent areas be inspected for hazardous
conditions? - ansDaily
in developing an S.O.P. for air monitoring in a Permit Required Confined Space you
would include what two factors? - ansPlacement of the blower and a weather
forecast
Infiltration can occur in a pipe when the pipe is: - anscracked, broken, fractures, has
roots coming into it etc.
Maintenance programs are based on: - ansPreventative and corrective maintenance
principles
Name and describe the three soil types - ansType A: cohesive soils like clay
Type B: Cohesive soil that have been disturbed or angular gravel
Type C: Granular Soils like sand. These are the least stable
Once enrolled in CIWQS, the "Collection System Questionnaire" must be updated at
least every: - ans12 Months
,CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
Personnel entering a Permit Required Confined Space must have the following
training - ansentry and rescue
Proper operation and maintenance of wastewater collection is defined as: -
anskeeping wastewater flowing through pipes
protective shoring systems options include: - ansproper shoring or benching of the
sides of the excavation, supporting the sides of a tench with shoring using a shield in
an excavation area.
rodents and insects can be controlled by - ansspraying manholes with an approved
pesticide
Roots can enter collection systems through: - anscracked pipes, broken pipes,
fractured pipes
Sources of excessive clear water in a collection system are usually caused by: -
ansinfiltration from a high water table
Temporary traffic control lanes created as part of a Temporary Traffic control Zone
setup on a street with a 35 MPH maximum speed limit shall be a minimum width of
______ - ans10 ft
The gas most commonly associated with septic wastewater is - ansHydrogen Sulfide
The goal of preventative maintenance is to? - ansAvoid breakdowns, severe damage,
or harmful depreciation
The lack of an unpleasant odor in a manhole, lift station or other structures does not
always mean that dangerous gases are not present because: - anssome dangerous
gasses are odorless (for example, carbon monoxide)
The lowest point on the inside of a pipe is called what? - ansthe invert
The main advantage of using CCTV is what? - ansYou can see and record the length
and severity of defective pipe
The main reason we add sodium hypochlorite to sewers is to control: - ansBOD
The oxygen level alarm normally goes off if oxygen levels are below: - ans19.5
percent
The very top of the outside of a pipe is called what? - ansThe crown
, CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
To find protective gear before application of a product, you should: - anslook at the
MSDS
To report in the Statewide SSO Data-base California Integrated Water Quality System
(CIWQS) regarding the location of a Category 2 SSO, how must you report the
location? - ansUsing the GPS coordinates
Tools used for sewer rodding include: - ansporcupine, root saw, square bar cork
screw
Vitrified clay pipe is what type of pipe? - ansRigid
What are all 7 steps of LOTO procedure? - ans1. Identify potential hazards
2. notify all affected employees
3. turn off/disable/isolate controls
4. Lock out all energy control switched (sign and date!)
5. Test by turning on controls and accounting for personnel before the safety test
6. turn control to OFF
7. Perform task (when complete, only the person who tagged out may remove the
lock and tag)
What are poly pigs used for? - ansto clean sewer force mains. They are propelled by
pressurized water flow
What are some advantages of hydraulic shoring systems? - ansThey are light enough
to be installed by one worker: from top down
They are gauge-regulated to ensure even distribution of pressure along the trench
line
They can have their trench faces "preloaded" to use the soils natural cohesion to
prevent movement
They can be adapted easily to various trench depths and widths
what are some characteristics of a competent person? - ansTrained and
knowledgeable, can identify soil class, understands the importance of PPE and the
SDS, knows how to identify problems
What are some common types of valves? - ansPlug, Gate, Butterfly, Ball, Check
Exam Questions and Answers () (Verified
Answers)
"High priority subsurface installations ae high pressure natural gas pipelines with
normal operating pressures greater than 415 kPa gauge, petroleum pipelines,
conductors or cables that are potentially hazardous to employees, or the public, if
damaged." This paragraph indicates that before the start date of an excavation,
what should occur? - ansAn agreed upon site visit
550 gallons of sewage overflow and do not reach any surface waters. What category
of overflow is this? - ansCategory 3
A flow of 650 pgm would be how many mgd? - ans0.936
A hazard that may damage a TV camera going through a sewer is: - ansan offset joint
A person who completes a training program in accordance with the requirements of
Title 8, Calif. Code of Regulations, Minimum Guidelines of the Common Ground
Alliance is considered a ______________ person - ansQualified Person
According to the State Water Resources Control Board Order No. 2006-003-DWQ,
each enrollee must develop and implement a system-specific: - ansSSMP (Sewer
System Management Plan)
After completing a Temporary Traffic Control setup for your work zone it is a good
practice to: - ansObserve how effective your TTC setup is working to control traffic
and make the necessary changes
Based on new Best Practices of the Common Ground Alliance for marking
underground Utilities, the Inquiry Identification Number for an Underground Service
Alert (USA) is viable for how many days? - ans28 days
Before starting a maintenance operation in a basement located in the backyard of a
residence you should: - anscontact the resident and politely ask permission to enter
their backyard
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause: -
ansodors
Clear water in entering a collection system is called what? - ansinfiltration
emergency stoppages in pipelines may be cleared safely by use of: - anshigh velocity
cleaners
Flatter sewer line grades may cause added sewer maintenance expense and odor
nuisance. This is caused by what? - ansA decrease in velocity which allows organic
,CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
and inorganic solids to settle out. This, in turn, allows biological activity to happen
which corrodes the pipe and releases hydrogen sulfide (H2S) which smells like rotten
eggs
For a nighttime Short Term Stationary Traffic Control Zone setup on low speed/ low
volume street, the minimum height of the traffic cones used shall be ________ - ans28
inches
How can the members of a balling crew communicate with each other? - ansHand
Signals
How high do your traffic cones need to be if the speed limit around your work zone is
35 MPH? - ans18". Cone height must be 18" if speed limit is 30 MPH or less and 28" if
the speed limit is 45 MPH or more
How long do you have to report a category 1 SSO? - ans2 hours
How long do you have to report a category 2 or 3 SSO? - ans3 days
how many flaggers are REQUIRED to perform a basic flagging operation? - ansone
How many types of common shoring are there? - ans6
How often must an excavation site and adjacent areas be inspected for hazardous
conditions? - ansDaily
in developing an S.O.P. for air monitoring in a Permit Required Confined Space you
would include what two factors? - ansPlacement of the blower and a weather
forecast
Infiltration can occur in a pipe when the pipe is: - anscracked, broken, fractures, has
roots coming into it etc.
Maintenance programs are based on: - ansPreventative and corrective maintenance
principles
Name and describe the three soil types - ansType A: cohesive soils like clay
Type B: Cohesive soil that have been disturbed or angular gravel
Type C: Granular Soils like sand. These are the least stable
Once enrolled in CIWQS, the "Collection System Questionnaire" must be updated at
least every: - ans12 Months
,CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
Personnel entering a Permit Required Confined Space must have the following
training - ansentry and rescue
Proper operation and maintenance of wastewater collection is defined as: -
anskeeping wastewater flowing through pipes
protective shoring systems options include: - ansproper shoring or benching of the
sides of the excavation, supporting the sides of a tench with shoring using a shield in
an excavation area.
rodents and insects can be controlled by - ansspraying manholes with an approved
pesticide
Roots can enter collection systems through: - anscracked pipes, broken pipes,
fractured pipes
Sources of excessive clear water in a collection system are usually caused by: -
ansinfiltration from a high water table
Temporary traffic control lanes created as part of a Temporary Traffic control Zone
setup on a street with a 35 MPH maximum speed limit shall be a minimum width of
______ - ans10 ft
The gas most commonly associated with septic wastewater is - ansHydrogen Sulfide
The goal of preventative maintenance is to? - ansAvoid breakdowns, severe damage,
or harmful depreciation
The lack of an unpleasant odor in a manhole, lift station or other structures does not
always mean that dangerous gases are not present because: - anssome dangerous
gasses are odorless (for example, carbon monoxide)
The lowest point on the inside of a pipe is called what? - ansthe invert
The main advantage of using CCTV is what? - ansYou can see and record the length
and severity of defective pipe
The main reason we add sodium hypochlorite to sewers is to control: - ansBOD
The oxygen level alarm normally goes off if oxygen levels are below: - ans19.5
percent
The very top of the outside of a pipe is called what? - ansThe crown
, CWEA Collections System Maintenance, Grade 1, 2, 3, 4,
Exam Questions and Answers () (Verified
Answers)
To find protective gear before application of a product, you should: - anslook at the
MSDS
To report in the Statewide SSO Data-base California Integrated Water Quality System
(CIWQS) regarding the location of a Category 2 SSO, how must you report the
location? - ansUsing the GPS coordinates
Tools used for sewer rodding include: - ansporcupine, root saw, square bar cork
screw
Vitrified clay pipe is what type of pipe? - ansRigid
What are all 7 steps of LOTO procedure? - ans1. Identify potential hazards
2. notify all affected employees
3. turn off/disable/isolate controls
4. Lock out all energy control switched (sign and date!)
5. Test by turning on controls and accounting for personnel before the safety test
6. turn control to OFF
7. Perform task (when complete, only the person who tagged out may remove the
lock and tag)
What are poly pigs used for? - ansto clean sewer force mains. They are propelled by
pressurized water flow
What are some advantages of hydraulic shoring systems? - ansThey are light enough
to be installed by one worker: from top down
They are gauge-regulated to ensure even distribution of pressure along the trench
line
They can have their trench faces "preloaded" to use the soils natural cohesion to
prevent movement
They can be adapted easily to various trench depths and widths
what are some characteristics of a competent person? - ansTrained and
knowledgeable, can identify soil class, understands the importance of PPE and the
SDS, knows how to identify problems
What are some common types of valves? - ansPlug, Gate, Butterfly, Ball, Check
