CWEA Grade 1 and 2 Tests Collection
Systems Maintenance-Graded A
Why are gasoline and volatile solvents objectionable when present in a sewer? - ANS-
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - ANS-You know what you are doing, are
qualified and are authorized
What are the different areas of traffic zones? - ANS-Advance Warning Area, Transition
Area, Activity Area (buffer space and work space), Termination Area. Could be 4 or 5,
justify your answer on the test!
why should hydrogen sulfide be controlled? - ANS-to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following training
- ANS-entry and rescue
To find protective gear before application of a product, you should: - ANS-look at the
MSDS
You receive a dispatch at 4:30 pm informing you that raw sewage spewing out of a
manhole onto the ground and into an adjacent small stream. The caller said the sewer
has been overflowing since 2pm. You arrive at 5:15 and find that the spill is overflowing
at 166 gallons per minute. You clear the problem after 22 minutes, how many reportable
unrecoverable gallons of raw sewage had reached the creek? - ANS-36,022 gallons
(don't be intimidated by how long these word problems are! Just find the important
information and take it one step at a time.)
"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? -
ANS-An agreed upon site visit
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
______ - ANS-10 ft
, 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 ________ - ANS-
28 inches
After completing a Temporary Traffic Control setup for your work zone it is a good
practice to: - ANS-Observe how effective your TTC setup is working to control traffic
and make the necessary changes
When a citizen wants information regarding a maintenance operation you should: -
ANS-Give them as much factual information as you can and offer to help them further
Before starting a maintenance operation in a basement located in the backyard of a
residence you should: - ANS-contact the resident and politely ask permission to enter
their backyard
Maintenance programs are based on: - ANS-Preventative and corrective maintenance
principles
The goal of preventative maintenance is to? - ANS-Avoid breakdowns, severe damage,
or harmful depreciation
What is the definition of a sanitary sewer system? - ANS-Any system of pipes, pump
stations, sewer lines, or other conveyances, upstream of a wastewater treatment plant
head work comprised of more than one mile of pipes and sewer lines, used to collect
and convey wastewater to a publicly owned treatment facility
What is the definition of "hydraulic capacity"? - ANS-The maximum flow a pipe is
expected to function at without creating a back up or discharge
What is the minimum velocity in a gravity sewer pipe? - ANS-2 ft/s. This speed prevents
the settling of solids, which in turn prevents corrosion and odor build-up
What are the access points of a gravity sewer system? - ANS-Manholes, Lift stations,
Building connections, junction chambers, terminal cleanouts
What is an Easement? - ANS-The legal right that allows placement of sewer in privately
owned property
What is the springline? - ANS-The theoretical center of the pipe
What is the top of the pipe called? - ANS-The crown
What is the lowest point inside of a pipe called? - ANS-The invert
Systems Maintenance-Graded A
Why are gasoline and volatile solvents objectionable when present in a sewer? - ANS-
They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment
panels, controls, wiring or circuits unless - ANS-You know what you are doing, are
qualified and are authorized
What are the different areas of traffic zones? - ANS-Advance Warning Area, Transition
Area, Activity Area (buffer space and work space), Termination Area. Could be 4 or 5,
justify your answer on the test!
why should hydrogen sulfide be controlled? - ANS-to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following training
- ANS-entry and rescue
To find protective gear before application of a product, you should: - ANS-look at the
MSDS
You receive a dispatch at 4:30 pm informing you that raw sewage spewing out of a
manhole onto the ground and into an adjacent small stream. The caller said the sewer
has been overflowing since 2pm. You arrive at 5:15 and find that the spill is overflowing
at 166 gallons per minute. You clear the problem after 22 minutes, how many reportable
unrecoverable gallons of raw sewage had reached the creek? - ANS-36,022 gallons
(don't be intimidated by how long these word problems are! Just find the important
information and take it one step at a time.)
"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? -
ANS-An agreed upon site visit
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
______ - ANS-10 ft
, 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 ________ - ANS-
28 inches
After completing a Temporary Traffic Control setup for your work zone it is a good
practice to: - ANS-Observe how effective your TTC setup is working to control traffic
and make the necessary changes
When a citizen wants information regarding a maintenance operation you should: -
ANS-Give them as much factual information as you can and offer to help them further
Before starting a maintenance operation in a basement located in the backyard of a
residence you should: - ANS-contact the resident and politely ask permission to enter
their backyard
Maintenance programs are based on: - ANS-Preventative and corrective maintenance
principles
The goal of preventative maintenance is to? - ANS-Avoid breakdowns, severe damage,
or harmful depreciation
What is the definition of a sanitary sewer system? - ANS-Any system of pipes, pump
stations, sewer lines, or other conveyances, upstream of a wastewater treatment plant
head work comprised of more than one mile of pipes and sewer lines, used to collect
and convey wastewater to a publicly owned treatment facility
What is the definition of "hydraulic capacity"? - ANS-The maximum flow a pipe is
expected to function at without creating a back up or discharge
What is the minimum velocity in a gravity sewer pipe? - ANS-2 ft/s. This speed prevents
the settling of solids, which in turn prevents corrosion and odor build-up
What are the access points of a gravity sewer system? - ANS-Manholes, Lift stations,
Building connections, junction chambers, terminal cleanouts
What is an Easement? - ANS-The legal right that allows placement of sewer in privately
owned property
What is the springline? - ANS-The theoretical center of the pipe
What is the top of the pipe called? - ANS-The crown
What is the lowest point inside of a pipe called? - ANS-The invert
