CWEA Collections Grade 2 Practice Test questions and
answers 2025\2026 A+ Grade
Why are gasoline and volatile solvents objectionable when present in a sewer?
- correct answer They produce an explosion hazard
You should never attempt to install, troubleshoot, maintain, repair, or replace electrical equipment
unless:
- correct answer You know what you are doing, are qualified, and are authorized.
How many different areas of traffic zones are there when working in roadways?
- correct answer Five
Why should hydrogen sulfide be controlled?
- correct answer To protect sewers and structures from corrosion
Personnel entering a Permit Required Confined Space must have the following training:
- correct answer Entry and rescue procedures
To find proper protective gear before application of a product, you would:
- correct answer Look at the MSDS (Material Safety Data Sheet)
The gas most commonly associated with septic wastewater is:
- correct answer Hydrogen Sulfide (H2S)
The lack of an unpleasant odor in a structure does not always mean that dangerous gases are not
present because:
- correct answer Some dangerous gases have no odor
What four conditions are necessary to create an explosion?
- correct answer Combustible gas, adequate oxygen, sufficient heat, and proper mixing of gas and
oxygen.
, What does "transition area" mean in traffic control?
- correct answer Moves traffic out of its normal path
The term "transition area" is one component of a:
- correct answer Traffic Control Zone
What elements should be considered to improve worker safety in High Speed Temporary Traffic Control
Zones?
- correct answer 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?
- correct answer Traffic control plan, by-pass connections, and spill containment.
"Spring Blades" are a type of tool used with:
- correct answer Power Rodder
Porcupine, Root Saw, and a Square Bar Cork Screw are all tools used for:
- correct answer Sewer rodding
What tool would you use to cut VCP pipe?
- correct answer Chain pipe cutter
Which conditions should a gas detection device test for?
- correct answer Hydrogen Sulfide, explosive/flammable gases, oxygen.
What does "LEL" mean on a gas detection meter?
- correct answer Lower explosive limit
The oxygen level alarm in a gas detection meter is normally set to go off at oxygen levels below:
- correct answer 19.5%
answers 2025\2026 A+ Grade
Why are gasoline and volatile solvents objectionable when present in a sewer?
- correct answer They produce an explosion hazard
You should never attempt to install, troubleshoot, maintain, repair, or replace electrical equipment
unless:
- correct answer You know what you are doing, are qualified, and are authorized.
How many different areas of traffic zones are there when working in roadways?
- correct answer Five
Why should hydrogen sulfide be controlled?
- correct answer To protect sewers and structures from corrosion
Personnel entering a Permit Required Confined Space must have the following training:
- correct answer Entry and rescue procedures
To find proper protective gear before application of a product, you would:
- correct answer Look at the MSDS (Material Safety Data Sheet)
The gas most commonly associated with septic wastewater is:
- correct answer Hydrogen Sulfide (H2S)
The lack of an unpleasant odor in a structure does not always mean that dangerous gases are not
present because:
- correct answer Some dangerous gases have no odor
What four conditions are necessary to create an explosion?
- correct answer Combustible gas, adequate oxygen, sufficient heat, and proper mixing of gas and
oxygen.
, What does "transition area" mean in traffic control?
- correct answer Moves traffic out of its normal path
The term "transition area" is one component of a:
- correct answer Traffic Control Zone
What elements should be considered to improve worker safety in High Speed Temporary Traffic Control
Zones?
- correct answer 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?
- correct answer Traffic control plan, by-pass connections, and spill containment.
"Spring Blades" are a type of tool used with:
- correct answer Power Rodder
Porcupine, Root Saw, and a Square Bar Cork Screw are all tools used for:
- correct answer Sewer rodding
What tool would you use to cut VCP pipe?
- correct answer Chain pipe cutter
Which conditions should a gas detection device test for?
- correct answer Hydrogen Sulfide, explosive/flammable gases, oxygen.
What does "LEL" mean on a gas detection meter?
- correct answer Lower explosive limit
The oxygen level alarm in a gas detection meter is normally set to go off at oxygen levels below:
- correct answer 19.5%
