CWEA CSM Grade 2 Practice test 2025 Contains 260 Questions and
correct answers/ CWEA Collection Systems Maintenance Grade 2
Exam | CWEA CSM Grade 2 Exam Prep Latest 2025-2026
According to OSHA standard, how far from the edge of an open excavation trench
should spoils piles be placed? - ANSWER-2ft.
Wastewater collections systems are built to? - ANSWER-Carry away wastewater
from homes and industries
CIWQS stand for: - ANSWER-California Integrated Water Quality System
What is the main objective of cleaning collection systems? - ANSWER-Prevent
blockages and overflows
What normal flows are recommended to reduce buildup of materials and will carry
normal solids? - ANSWER-2 fps
The State Wide General Waste Discharge Requirements affect which of the
following: - ANSWER-All owners of operations of sanitary sewer systems greater
than 1-mile in length
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
pg. 1
,Personnel entering a Permit Required Confined Space must have the following
training:
Entry and rescue procedures
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.
If a stoppage occurs below a sewer ball, it must be cleared as soon as possible to
avoid? - ANSWER-Flooding homes and/or streets
To find proper protective gear before application of a product, you would? -
ANSWER-Look at the material safety data sheet (MSDS)
The gas most commonly associated with septic wastewater is? - ANSWER-
Hydrogen sulfide (H2S)
The oxygen level alarm in a gas detection meter normally set to go off at oxygen
levels below? - ANSWER-19.5%
What are the requirements for a Class B license? - ANSWER-Vehicle weight more
than 26,000 Is
pg. 2
,What is the one thing you don't have to check on a pre-trip inspection? -
ANSWER-Fuel
Which of the following would you check in your pre-trip first? - ANSWER-Gear
box low oil
What check should be performed before driving a vehicle? - ANSWER-
Mechanical/Safety
What are the main purpose of Manholes? - ANSWER-To access sewers
What is the minimum size cone that can be used in a 25mph or 35mph zone? -
ANSWER-18"
If the soil has a compressive strength of .05 or less it is considered? - ANSWER-
Туре B
If the soil strength is greater than .05 tsf but less than 1.5 tsf or has angular gravel,
you have what type of soil? - ANSWER-B
What does PVC stand for? - ANSWER-Polyvinylchloride
What would be the ideal sewer lateral connection to a sewer mainline? -
ANSWER-Wye
How long is a DigAlert ticket valid for (after which it is expired)? - ANSWER-28
days
pg. 3
, What degree of nozzle jet would an operator use to jet clean up a steep grade? -
ANSWER-15%
SSO Reports shall be kept on file for how long? - ANSWER-5 years
SSO stands for: - ANSWER-Sanitary Sewer Overflow
I/l stands for; - ANSWER-Inflow / Infiltration
VCP stands for: - ANSWER-Vitrified Clay Pipe
A Cast-in-Place manhole base is one that: - ANSWER-the concrete is poured and
the base is formed in the field
A rigid pipe will: - ANSWER-Break or crack if not supported properly
What is the least effective way of cleaning grease: - ANSWER-Bucket Machine
Which testing method is not recommended for identifying I/I & Exfiltration for
manholes: - ANSWER-Air/Water test
A Mandrel is a: - ANSWER-testing device used to measure for excessive
deflection in a flexible conduit.
Why are gasoline and volatile solvents objectionable when present in a sewer? -
ANSWER-They produce an explosion hazard
pg. 4
correct answers/ CWEA Collection Systems Maintenance Grade 2
Exam | CWEA CSM Grade 2 Exam Prep Latest 2025-2026
According to OSHA standard, how far from the edge of an open excavation trench
should spoils piles be placed? - ANSWER-2ft.
Wastewater collections systems are built to? - ANSWER-Carry away wastewater
from homes and industries
CIWQS stand for: - ANSWER-California Integrated Water Quality System
What is the main objective of cleaning collection systems? - ANSWER-Prevent
blockages and overflows
What normal flows are recommended to reduce buildup of materials and will carry
normal solids? - ANSWER-2 fps
The State Wide General Waste Discharge Requirements affect which of the
following: - ANSWER-All owners of operations of sanitary sewer systems greater
than 1-mile in length
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
pg. 1
,Personnel entering a Permit Required Confined Space must have the following
training:
Entry and rescue procedures
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.
If a stoppage occurs below a sewer ball, it must be cleared as soon as possible to
avoid? - ANSWER-Flooding homes and/or streets
To find proper protective gear before application of a product, you would? -
ANSWER-Look at the material safety data sheet (MSDS)
The gas most commonly associated with septic wastewater is? - ANSWER-
Hydrogen sulfide (H2S)
The oxygen level alarm in a gas detection meter normally set to go off at oxygen
levels below? - ANSWER-19.5%
What are the requirements for a Class B license? - ANSWER-Vehicle weight more
than 26,000 Is
pg. 2
,What is the one thing you don't have to check on a pre-trip inspection? -
ANSWER-Fuel
Which of the following would you check in your pre-trip first? - ANSWER-Gear
box low oil
What check should be performed before driving a vehicle? - ANSWER-
Mechanical/Safety
What are the main purpose of Manholes? - ANSWER-To access sewers
What is the minimum size cone that can be used in a 25mph or 35mph zone? -
ANSWER-18"
If the soil has a compressive strength of .05 or less it is considered? - ANSWER-
Туре B
If the soil strength is greater than .05 tsf but less than 1.5 tsf or has angular gravel,
you have what type of soil? - ANSWER-B
What does PVC stand for? - ANSWER-Polyvinylchloride
What would be the ideal sewer lateral connection to a sewer mainline? -
ANSWER-Wye
How long is a DigAlert ticket valid for (after which it is expired)? - ANSWER-28
days
pg. 3
, What degree of nozzle jet would an operator use to jet clean up a steep grade? -
ANSWER-15%
SSO Reports shall be kept on file for how long? - ANSWER-5 years
SSO stands for: - ANSWER-Sanitary Sewer Overflow
I/l stands for; - ANSWER-Inflow / Infiltration
VCP stands for: - ANSWER-Vitrified Clay Pipe
A Cast-in-Place manhole base is one that: - ANSWER-the concrete is poured and
the base is formed in the field
A rigid pipe will: - ANSWER-Break or crack if not supported properly
What is the least effective way of cleaning grease: - ANSWER-Bucket Machine
Which testing method is not recommended for identifying I/I & Exfiltration for
manholes: - ANSWER-Air/Water test
A Mandrel is a: - ANSWER-testing device used to measure for excessive
deflection in a flexible conduit.
Why are gasoline and volatile solvents objectionable when present in a sewer? -
ANSWER-They produce an explosion hazard
pg. 4
