CWEA Practice Test Questions and Answers 2026/2027 Verified

CWEA Practice Test Questions and Answers 2026/2027 Verified

Why are gasoline and volatile solvents objectionable when present in a sewer? -

✔✔They produce an explosion hazard

You should never attempt to install, troubleshoot, maintain, repair, or replace electrical

equipment unless: - ✔✔You know what you are doing, are qualified, and are authorized.

How many different areas of traffic zones are there when working in roadways? -

✔✔Five

Why should hydrogen sulfide be controlled? - ✔✔To protect sewers and structures from

corrosion

Personnel entering a Permit Required Confined Space must have the following training:

- ✔✔Entry and rescue procedures

To find proper protective gear before application of a product, you would: - ✔✔Look at

the MSDS (Material Safety Data Sheet)

The gas most commonly associated with septic wastewater is: - ✔✔Hydrogen Sulfide

(H2S)

The lack of an unpleasant odor in a structure does not always mean that dangerous

gases are not present because: - ✔✔Some dangerous gases have no odor

What four conditions are necessary to create an explosion? - ✔✔Combustible gas,

adequate oxygen, sufficient heat, and proper mixing of gas and oxygen.

What does "transition area" mean in traffic control? - ✔✔Moves traffic out of its normal

path

The term "transition area" is one component of a: - ✔✔Traffic Control Zone

What elements should be considered to improve worker safety in High Speed

Temporary Traffic Control Zones? - ✔✔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? - ✔✔Traffic control plan, by-pass connections, and spill containment.

"Spring Blades" are a type of tool used with: - ✔✔Power Rodder