CWEA Grade 1 Questions with Detailed Verified
Answers
What does the term inflow refer to in a wastewater collection system? Ans: Water
discharged into a collection system and service connections from sources other than
regular connections
What is one cause of an ineffective maintenance program? Ans: Airtight joint
Which items are sources of pressure on the financial resources of a wasterwater
collection system agency? Ans: Reduction of a federal, state, and local funds
What problem can occur when velocities in a collection system are too high or too
low? Ans: The velocities can interfere with the operation and maintenance of the
system
What are lateral and branch sewers? Ans: Sewers that serve the upper ends of the
street sewer components of a collection system
Why must building sewer connections be constructed with care? Ans: To avoid
sources of ground water infiltration and sewer stoppages
When operators review collection system designs, which factors should be
considered? Ans: Manhole locations
What kind of training should each person whose actions affect TTC zone safety
receive? Ans: Training appropriate to the job decisions each individual is required to
make
What is a TTC plan? Ans: A description of traffic control to be used for facilitating all
traffic through a TTC zone
When are governing road authorities most likely to restrict construction work in
streets? Ans: Peak traffic periods
, In what area should work activity and storage of equipment, vehicles, and materials not
occur? Ans: Buffer space
What is one way to minimize the possibility of temporary traffic control cones being
blown over or displaced by wind or moving vehicular traffic? Ans: Apply
retroreflective tape or equip with lighting devices
Which item is not a major category of hazards? Ans: Insect, bug, rodent, and snake
bites
What is the major concern in confined spaces? Ans: Whether the existing ventilation
is capable of removing atmospheric hazards that may exist or develop
When using atmospheric analyzers to test the air in confined spaces, in what order
should test be performed? Ans: Oxygen content, combustible gases and toxic gases
Why must the electrochemical sensor in an atmospheric test instrument be replaced
periodically? Ans: It loses its sensitivity to hydrogen sulfide
When installing braces or screw jacks which one should be installed first? Ans: Top
brace or jack
If the human body becomes a variable resistor, what determines the amount of damage
the electric current does to the body Ans: The amount of current that flows through
the body
Which diseases can be caused by bacteria that may be present in untreated domestic
wastewater? Ans: Cholera and typhoid fever
Gravity flow Ans: Water or wasterwater flowing from a higher elevation to a lower
elevation due to the force of gravity
Infiltration Ans: The seepage of groundwater into a wastewater collection system,
including service connections
© Get it right 2025 Getaway - Stuvia US All rights reserved
Answers
What does the term inflow refer to in a wastewater collection system? Ans: Water
discharged into a collection system and service connections from sources other than
regular connections
What is one cause of an ineffective maintenance program? Ans: Airtight joint
Which items are sources of pressure on the financial resources of a wasterwater
collection system agency? Ans: Reduction of a federal, state, and local funds
What problem can occur when velocities in a collection system are too high or too
low? Ans: The velocities can interfere with the operation and maintenance of the
system
What are lateral and branch sewers? Ans: Sewers that serve the upper ends of the
street sewer components of a collection system
Why must building sewer connections be constructed with care? Ans: To avoid
sources of ground water infiltration and sewer stoppages
When operators review collection system designs, which factors should be
considered? Ans: Manhole locations
What kind of training should each person whose actions affect TTC zone safety
receive? Ans: Training appropriate to the job decisions each individual is required to
make
What is a TTC plan? Ans: A description of traffic control to be used for facilitating all
traffic through a TTC zone
When are governing road authorities most likely to restrict construction work in
streets? Ans: Peak traffic periods
, In what area should work activity and storage of equipment, vehicles, and materials not
occur? Ans: Buffer space
What is one way to minimize the possibility of temporary traffic control cones being
blown over or displaced by wind or moving vehicular traffic? Ans: Apply
retroreflective tape or equip with lighting devices
Which item is not a major category of hazards? Ans: Insect, bug, rodent, and snake
bites
What is the major concern in confined spaces? Ans: Whether the existing ventilation
is capable of removing atmospheric hazards that may exist or develop
When using atmospheric analyzers to test the air in confined spaces, in what order
should test be performed? Ans: Oxygen content, combustible gases and toxic gases
Why must the electrochemical sensor in an atmospheric test instrument be replaced
periodically? Ans: It loses its sensitivity to hydrogen sulfide
When installing braces or screw jacks which one should be installed first? Ans: Top
brace or jack
If the human body becomes a variable resistor, what determines the amount of damage
the electric current does to the body Ans: The amount of current that flows through
the body
Which diseases can be caused by bacteria that may be present in untreated domestic
wastewater? Ans: Cholera and typhoid fever
Gravity flow Ans: Water or wasterwater flowing from a higher elevation to a lower
elevation due to the force of gravity
Infiltration Ans: The seepage of groundwater into a wastewater collection system,
including service connections
© Get it right 2025 Getaway - Stuvia US All rights reserved
