CWEA Grade 1 and 2 Tests Collection Systems Maintenance Latest Updated 2024
What are some advantages of hydraulic shoring systems? - ANSWER-They 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 the components of a temporary traffic control? - ANSWER-Traffic space
that allows traffic to pass by activity, temporary lanes with a 10' minimum width
and a 5' clearance from the excavation, and tapers that are used in the transition
area and moves traffic out of its normal path.
What is the minimum length of a taper in a temporary traffic control setup? -
ANSWER-50'
,How high do your traffic cones need to be if the speed limit around your work zone
is 35 MPH? - ANSWER-18". 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 many flaggers are REQUIRED to perform a basic flagging operation? -
ANSWER-one
Why are gasoline and volatile solvents objectionable when present in a sewer? -
ANSWER-They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless - ANSWER-You know what
you are doing, are qualified and are authorized
What are the different areas of traffic zones? - ANSWER-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? - ANSWER-to protect from corrosion
and odors
Personnel entering a Permit Required Confined Space must have the following
training - ANSWER-entry and rescue
, To find protective gear before application of a product, you should: - ANSWER-look
at the MSDS
The gas most commonly associated with septic wastewater is - ANSWER-Hydrogen
Sulfide
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: - ANSWER-some
dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - ANSWER-
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - ANSWER-It moves
traffic out of its normal path
what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones? - ANSWER-Rerouting traffic around the work
site, positioning of law enforcement officers in the temporary traffic control zone,
and work zone training
What are some advantages of hydraulic shoring systems? - ANSWER-They 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 the components of a temporary traffic control? - ANSWER-Traffic space
that allows traffic to pass by activity, temporary lanes with a 10' minimum width
and a 5' clearance from the excavation, and tapers that are used in the transition
area and moves traffic out of its normal path.
What is the minimum length of a taper in a temporary traffic control setup? -
ANSWER-50'
,How high do your traffic cones need to be if the speed limit around your work zone
is 35 MPH? - ANSWER-18". 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 many flaggers are REQUIRED to perform a basic flagging operation? -
ANSWER-one
Why are gasoline and volatile solvents objectionable when present in a sewer? -
ANSWER-They produce an explosion hazard
You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless - ANSWER-You know what
you are doing, are qualified and are authorized
What are the different areas of traffic zones? - ANSWER-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? - ANSWER-to protect from corrosion
and odors
Personnel entering a Permit Required Confined Space must have the following
training - ANSWER-entry and rescue
, To find protective gear before application of a product, you should: - ANSWER-look
at the MSDS
The gas most commonly associated with septic wastewater is - ANSWER-Hydrogen
Sulfide
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: - ANSWER-some
dangerous gasses are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - ANSWER-
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - ANSWER-It moves
traffic out of its normal path
what elements should be considered to improve worker safety in High speed
Temporary Traffic control Zones? - ANSWER-Rerouting traffic around the work
site, positioning of law enforcement officers in the temporary traffic control zone,
and work zone training
