CWEA CSM GRADE 2 - PRACTICE TEST
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%
When developing an S.O.P. for scheduled maintenance of electrical equipment, what
program should be addressed as a primary safety guideline? - Correct Answer ✔✔ -
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? - Correct Answer ✔✔ -
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: - Correct Answer ✔✔ - Permit Required Confined Space
According to a State Water Resources Control Board order, each Enrollee must develop
and implement a system-specific: - Correct Answer ✔✔ - Sewer System Management
Plan (SSMP)
Category 1 SSO's that discharge to a drainage channel and/or surface water must be
reported within: - Correct Answer ✔✔ - 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: - Correct
Answer ✔✔ - the GPS coordinates
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause odors,
true or false? - Correct Answer ✔✔ - True
Flatter sewer line grades may cause added sewer maintenance expense and odor
nuisance. The problem is most likely caused by: - Correct Answer ✔✔ - 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? - Correct Answer ✔✔ - True
What is the first thing to consider when selecting a solution to clear a stoppage in a
sewer? - Correct Answer ✔✔ - 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? - Correct Answer ✔✔ - 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
V = 0.785 x 0.833 ft x 0.833 ft x 300 ft
V = 163.41 cubic feet
Convert to Gallons:
163.41 cu ft x (7.48 gal / 1 cu ft) = 1223.31 gal
Infiltration can be caused by cracked pipes, true or false? - Correct Answer ✔✔ - True
The main reason for adding sodium hypochlorite to sewers is to control: - Correct
Answer ✔✔ - Odor
Roots can enter collection systems through pipe cracks, true or false? - Correct Answer
✔✔ - True
The lowest point on the inside of a pipeline is called the: - Correct Answer ✔✔ - Invert
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%
When developing an S.O.P. for scheduled maintenance of electrical equipment, what
program should be addressed as a primary safety guideline? - Correct Answer ✔✔ -
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? - Correct Answer ✔✔ -
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: - Correct Answer ✔✔ - Permit Required Confined Space
According to a State Water Resources Control Board order, each Enrollee must develop
and implement a system-specific: - Correct Answer ✔✔ - Sewer System Management
Plan (SSMP)
Category 1 SSO's that discharge to a drainage channel and/or surface water must be
reported within: - Correct Answer ✔✔ - 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: - Correct
Answer ✔✔ - the GPS coordinates
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause odors,
true or false? - Correct Answer ✔✔ - True
Flatter sewer line grades may cause added sewer maintenance expense and odor
nuisance. The problem is most likely caused by: - Correct Answer ✔✔ - 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? - Correct Answer ✔✔ - True
What is the first thing to consider when selecting a solution to clear a stoppage in a
sewer? - Correct Answer ✔✔ - 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? - Correct Answer ✔✔ - 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
V = 0.785 x 0.833 ft x 0.833 ft x 300 ft
V = 163.41 cubic feet
Convert to Gallons:
163.41 cu ft x (7.48 gal / 1 cu ft) = 1223.31 gal
Infiltration can be caused by cracked pipes, true or false? - Correct Answer ✔✔ - True
The main reason for adding sodium hypochlorite to sewers is to control: - Correct
Answer ✔✔ - Odor
Roots can enter collection systems through pipe cracks, true or false? - Correct Answer
✔✔ - True
The lowest point on the inside of a pipeline is called the: - Correct Answer ✔✔ - Invert
