CWEA Collections Grade 2 Practice Solution Manual Fully Solved (Latest 2025)
Why are gasoline and volatile solvents objectionable when present in a sewer? - Answers They produce
an explosion hazard
You should never attempt to install, troubleshoot, maintain, repair, or replace electrical equipment
unless: - Answers You know what you are doing, are qualified, and are authorized.
How many different areas of traffic zones are there when working in roadways? - Answers Five
Why should hydrogen sulfide be controlled? - Answers To protect sewers and structures from corrosion
Personnel entering a Permit Required Confined Space must have the following training: - Answers Entry
and rescue procedures
To find proper protective gear before application of a product, you would: - Answers Look at the MSDS
(Material Safety Data Sheet)
The gas most commonly associated with septic wastewater is: - Answers Hydrogen Sulfide (H2S)
The lack of an unpleasant odor in a structure does not always mean that dangerous gases are not
present because: - Answers Some dangerous gases have no odor
What four conditions are necessary to create an explosion? - Answers Combustible gas, adequate
oxygen, sufficient heat, and proper mixing of gas and oxygen.
What does "transition area" mean in traffic control? - Answers Moves traffic out of its normal path
The term "transition area" is one component of a: - Answers Traffic Control Zone
What elements should be considered to improve worker safety in High Speed Temporary Traffic Control
Zones? - Answers Rerouting traffic around the work site, positioning of law enforcement officers in the
temporary traffic control zone, and work zone training.
What key factors would you need to address when developing an S.O.P. for Lift Station failure? -
Answers Traffic control plan, by-pass connections, and spill containment.
"Spring Blades" are a type of tool used with: - Answers Power Rodder
Porcupine, Root Saw, and a Square Bar Cork Screw are all tools used for: - Answers Sewer rodding
What tool would you use to cut VCP pipe? - Answers Chain pipe cutter
Which conditions should a gas detection device test for? - Answers Hydrogen Sulfide,
explosive/flammable gases, oxygen.
, What does "LEL" mean on a gas detection meter? - Answers Lower explosive limit
The oxygen level alarm in a gas detection meter is normally set to go off at oxygen levels below: -
Answers 19.5%
When developing an S.O.P. for scheduled maintenance of electrical equipment, what program should be
addressed as a primary safety guideline? - Answers The L.O.T.O. (Lock Out Tag Out) Program
What document would you require to be referenced when developing an S.O.P. for hazardous substance
spill cleanup as well as spill containment? - Answers M.S.D.S.
Placement of the Blower and P.P.E. are two things you would include in developing an S.O.P. for air
monitoring in a: - Answers Permit Required Confined Space
According to a State Water Resources Control Board order, each Enrollee must develop and implement
a system-specific: - Answers Sewer System Management Plan (SSMP)
Category 1 SSO's that discharge to a drainage channel and/or surface water must be reported within: -
Answers 2 hours
To report in the Statewide SSO Data-base California Integrated Water Quality System (CIWQS), regarding
the location of a Category 2 SSO, you must know: - Answers the GPS coordinates
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause odors, true or false? -
Answers True
Flatter sewer line grades may cause added sewer maintenance expense and odor nuisance. The problem
is most likely caused by: - Answers A decrease in velocity allowing organic and inorganic solids to settle
out
Infiltration from a high water table can be one source of excessive clear water in a collection system,
true or false? - Answers True
What is the first thing to consider when selecting a solution to clear a stoppage in a sewer? - Answers
Cause of stoppage
The interior of 300 feet of 12-inch pipe is uniformly coated with one inch of grease. How many gallons
will this pipe hold when filled with water? - Answers 12 inches (diameter of pipe) - 2 inches (grease on
pipe) = 10 inches
Convert inches to feet:
10 inches x (1 foot / 12 inches) = 0.833 feet
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
Why are gasoline and volatile solvents objectionable when present in a sewer? - Answers They produce
an explosion hazard
You should never attempt to install, troubleshoot, maintain, repair, or replace electrical equipment
unless: - Answers You know what you are doing, are qualified, and are authorized.
How many different areas of traffic zones are there when working in roadways? - Answers Five
Why should hydrogen sulfide be controlled? - Answers To protect sewers and structures from corrosion
Personnel entering a Permit Required Confined Space must have the following training: - Answers Entry
and rescue procedures
To find proper protective gear before application of a product, you would: - Answers Look at the MSDS
(Material Safety Data Sheet)
The gas most commonly associated with septic wastewater is: - Answers Hydrogen Sulfide (H2S)
The lack of an unpleasant odor in a structure does not always mean that dangerous gases are not
present because: - Answers Some dangerous gases have no odor
What four conditions are necessary to create an explosion? - Answers Combustible gas, adequate
oxygen, sufficient heat, and proper mixing of gas and oxygen.
What does "transition area" mean in traffic control? - Answers Moves traffic out of its normal path
The term "transition area" is one component of a: - Answers Traffic Control Zone
What elements should be considered to improve worker safety in High Speed Temporary Traffic Control
Zones? - Answers Rerouting traffic around the work site, positioning of law enforcement officers in the
temporary traffic control zone, and work zone training.
What key factors would you need to address when developing an S.O.P. for Lift Station failure? -
Answers Traffic control plan, by-pass connections, and spill containment.
"Spring Blades" are a type of tool used with: - Answers Power Rodder
Porcupine, Root Saw, and a Square Bar Cork Screw are all tools used for: - Answers Sewer rodding
What tool would you use to cut VCP pipe? - Answers Chain pipe cutter
Which conditions should a gas detection device test for? - Answers Hydrogen Sulfide,
explosive/flammable gases, oxygen.
, What does "LEL" mean on a gas detection meter? - Answers Lower explosive limit
The oxygen level alarm in a gas detection meter is normally set to go off at oxygen levels below: -
Answers 19.5%
When developing an S.O.P. for scheduled maintenance of electrical equipment, what program should be
addressed as a primary safety guideline? - Answers The L.O.T.O. (Lock Out Tag Out) Program
What document would you require to be referenced when developing an S.O.P. for hazardous substance
spill cleanup as well as spill containment? - Answers M.S.D.S.
Placement of the Blower and P.P.E. are two things you would include in developing an S.O.P. for air
monitoring in a: - Answers Permit Required Confined Space
According to a State Water Resources Control Board order, each Enrollee must develop and implement
a system-specific: - Answers Sewer System Management Plan (SSMP)
Category 1 SSO's that discharge to a drainage channel and/or surface water must be reported within: -
Answers 2 hours
To report in the Statewide SSO Data-base California Integrated Water Quality System (CIWQS), regarding
the location of a Category 2 SSO, you must know: - Answers the GPS coordinates
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause odors, true or false? -
Answers True
Flatter sewer line grades may cause added sewer maintenance expense and odor nuisance. The problem
is most likely caused by: - Answers A decrease in velocity allowing organic and inorganic solids to settle
out
Infiltration from a high water table can be one source of excessive clear water in a collection system,
true or false? - Answers True
What is the first thing to consider when selecting a solution to clear a stoppage in a sewer? - Answers
Cause of stoppage
The interior of 300 feet of 12-inch pipe is uniformly coated with one inch of grease. How many gallons
will this pipe hold when filled with water? - Answers 12 inches (diameter of pipe) - 2 inches (grease on
pipe) = 10 inches
Convert inches to feet:
10 inches x (1 foot / 12 inches) = 0.833 feet
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
