CWEA Collections Grade 1, 2, & 3 Practice Exam
New Latest Version Updated 2024-2025 with All
Questions and Answers
Grade 1
You have an air compressor and you have been instructed to compact the backfill in a trench.
Which of the following is the best tool to use? ----------- Correct Answer ----------- Tamper
Which type of shovel do collection system technologist use ----------- Correct Answer -----------
Grit Shovel
What type of saw is used to cut asphalt? ----------- Correct Answer ----------- Diamond bladed or
toothed power saw
Googles, earplugs, and glove are needed when using a ----------- Correct Answer ----------- Power
Grinder
What type of equipment should be used to excavate a broken sewer pipe? ----------- Correct
Answer ----------- Backhoe
What is a mechanical means to dislodge material from a sewer? ----------- Correct Answer --------
--- Scraping
The formula for calculating the volume of a wet well is ----------- Correct Answer -----------
V=W*L*H
Tasks preformed by a collection system operator includes: ----------- Correct Answer -----------
Maintaining collection system equipment
One cubic food per second flow is equal to ----------- Correct Answer ----------- 26,928 Gallons
To properly operate a power rodder ----------- Correct Answer ----------- Make sure all the torque
is out of it before handling.
The diameter of a wet well is 10 feet. If filled to a depth of 10 feet, it will contain approximately
----------- Correct Answer ----------- Show Work = 5,872 Gallons
Sewer maintenance vehicles are ----------- Correct Answer ----------- difficult to maneuver
At low concentrations, hydrogen sulfide smells like ----------- Correct Answer ----------- Rotten
Eggs
,which safety hazard in a collection system operations can be detected by an insturment? ----------
- Correct Answer ----------- Toxic Gases
What must be checked first before entering a manhole? ----------- Correct Answer -----------
Proper barricades or warning devices around manhole.
When should field crews use signs and cones? ----------- Correct Answer ----------- When over
half the street is blocked.
The different zones of traffic control include ----------- Correct Answer ----------- buffer
Elements of defensive driving include ----------- Correct Answer ----------- having your vehicle
under control
The primary function of an entry supervisor is to ----------- Correct Answer ----------- maintain
overall saftey of permited confied space operations
What should be the alarm set point for oxygen in an atmospheric monitoring/testing device? -----
------ Correct Answer ----------- 19.5%
Warning,caution,danger,on a label means ----------- Correct Answer ----------- Hazardous
MSDS means ----------- Correct Answer ----------- Material Data Safety Sheet
What is the purpose of the OSHA Hazard Communication SHeet ----------- Correct Answer ------
----- To make sure employees know about any hazardous chemicals they may contact
How can traffic be warned of your presence in the street? ----------- Correct Answer -----------
Signs,Cones,Flagman
What check should be preformed before driving a vehicle? ----------- Correct Answer -----------
Mechanical/Safety
Where will collection system operators most likely find black windows Spiders and scorpions. --
--------- Correct Answer ----------- Manholes
Typical safety hazards in collections system operations include ----------- Correct Answer --------
--- Oxygen defiency
What is an orifice plate? ----------- Correct Answer ----------- A plate with a small hole in it to
restrict the flow.
Grade 2
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
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