CWEA GRADE 1 LAB ANALYST – CALIFORNIA
WATER ENVIRONMENT ASSOCIATION – EXAM
QUESTIONS AND ANSWERS
ALREADY PASSED 100%
What does the term inflow refer to in a wastewater collection system?
Water discharged into a collection system and service connections from sources other than
regular connections
What is one cause of an ineffective maintenance program?
Airtight joint
Which items are sources of pressure on the financial resources of a wasterwater collection
system agency?
Reduction of a federal, state, and local funds
What problem can occur when velocities in a collection system are too high or too low?
The velocities can interfere with the operation and maintenance of the system
What are lateral and branch sewers?
Sewers that serve the upper ends of the street sewer components of a collection system
Why must building sewer connections be constructed with care?
To avoid sources of ground water infiltration and sewer stoppages
When operators review collection system designs, which factors should be considered?
Manhole locations
What kind of training should each person whose actions affect TTC zone safety receive?
Training appropriate to the job decisions each individual is required to make
What is a TTC plan?
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?
Peak traffic periods
, In what area should work activity and storage of equipment, vehicles, and materials not occur?
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?
Apply retroreflective tape or equip with lighting devices
Which item is not a major category of hazards?
Insect, bug, rodent, and snake bites
What is the major concern in confined spaces?
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?
Oxygen content, combustible gases and toxic gases
Why must the electrochemical sensor in an atmospheric test instrument be replaced periodically?
It loses its sensitivity to hydrogen sulfide
When installing braces or screw jacks which one should be installed first?
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
The amount of current that flows through the body
Which diseases can be caused by bacteria that may be present in untreated domestic wastewater?
Cholera and typhoid fever
Gravity flow
Water or wasterwater flowing from a higher elevation to a lower elevation due to the force of
gravity
Infiltration
The seepage of groundwater into a wastewater collection system, including service connections
Exfiltration
WATER ENVIRONMENT ASSOCIATION – EXAM
QUESTIONS AND ANSWERS
ALREADY PASSED 100%
What does the term inflow refer to in a wastewater collection system?
Water discharged into a collection system and service connections from sources other than
regular connections
What is one cause of an ineffective maintenance program?
Airtight joint
Which items are sources of pressure on the financial resources of a wasterwater collection
system agency?
Reduction of a federal, state, and local funds
What problem can occur when velocities in a collection system are too high or too low?
The velocities can interfere with the operation and maintenance of the system
What are lateral and branch sewers?
Sewers that serve the upper ends of the street sewer components of a collection system
Why must building sewer connections be constructed with care?
To avoid sources of ground water infiltration and sewer stoppages
When operators review collection system designs, which factors should be considered?
Manhole locations
What kind of training should each person whose actions affect TTC zone safety receive?
Training appropriate to the job decisions each individual is required to make
What is a TTC plan?
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?
Peak traffic periods
, In what area should work activity and storage of equipment, vehicles, and materials not occur?
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?
Apply retroreflective tape or equip with lighting devices
Which item is not a major category of hazards?
Insect, bug, rodent, and snake bites
What is the major concern in confined spaces?
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?
Oxygen content, combustible gases and toxic gases
Why must the electrochemical sensor in an atmospheric test instrument be replaced periodically?
It loses its sensitivity to hydrogen sulfide
When installing braces or screw jacks which one should be installed first?
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
The amount of current that flows through the body
Which diseases can be caused by bacteria that may be present in untreated domestic wastewater?
Cholera and typhoid fever
Gravity flow
Water or wasterwater flowing from a higher elevation to a lower elevation due to the force of
gravity
Infiltration
The seepage of groundwater into a wastewater collection system, including service connections
Exfiltration
