CWEA Lab Analyst grade I Vocab Exam
2026 Questions and Answers
40 CFR 121- 124 - Correct answer-The federal storm water regulations for the
permitting of municipalities and industries. Regulations define storm water terms,
permitting, inspecting, and sampling measurements
40 CFR 136 - Correct answer-The regulations for sampling preservation and
analyses of water, wastewater, and solid waste
40 CFR 403 - Correct answer-The federal regulations defining the elements of a
pretreatment program, prohibited discharges, and the approval process for
establishing a pretreatment program
Acid - Correct answer-A compound which liberates hydrogen ions and has a pH
below 7
Alkalinity - Correct answer-The measurement of a sample's capacity to neutralize
acid
Approval Authority - Correct answer-The agency determining whether a
pretreatment program contains the necessary elements to meet the intent of the Act
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, Atomic Weight - Correct answer-The sum of the number of protons and the
number of neutrons in the nucleus of an atom; atomic weights of elements are
found on the periodic table
Base - Correct answer-A compound which liberates hydroxide ions and have a pH
above 7
Biochemical Oxygen Demands (BOD) - Correct answer-The quality of oxygen
utilized in the biochemical oxidation of organic matter under standard lab
procedures for 5 days at 20 °C, usually expressed as a concentration (mg/L). BOD
measurements are used to indicate the organic "strength" of wastewater
Biological Treament - Correct answer-A waste treatment process by which bacteria
and other microorganisms break down complex organic or inorganic (ie ammonia)
materials into simple, nontoxic, more stable compounds
Categorical Industrial User (CIU) - Correct answer-An industrial user (refer to IU)
that is conducting processes subject to a categorical standard promulgated by the
US EPA
centrifugal pumps - Correct answer-pumps using centrifugal force to convey
liquid. Discharge will vary according to inlet and discharge pressure
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
2026 Questions and Answers
40 CFR 121- 124 - Correct answer-The federal storm water regulations for the
permitting of municipalities and industries. Regulations define storm water terms,
permitting, inspecting, and sampling measurements
40 CFR 136 - Correct answer-The regulations for sampling preservation and
analyses of water, wastewater, and solid waste
40 CFR 403 - Correct answer-The federal regulations defining the elements of a
pretreatment program, prohibited discharges, and the approval process for
establishing a pretreatment program
Acid - Correct answer-A compound which liberates hydrogen ions and has a pH
below 7
Alkalinity - Correct answer-The measurement of a sample's capacity to neutralize
acid
Approval Authority - Correct answer-The agency determining whether a
pretreatment program contains the necessary elements to meet the intent of the Act
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Atomic Weight - Correct answer-The sum of the number of protons and the
number of neutrons in the nucleus of an atom; atomic weights of elements are
found on the periodic table
Base - Correct answer-A compound which liberates hydroxide ions and have a pH
above 7
Biochemical Oxygen Demands (BOD) - Correct answer-The quality of oxygen
utilized in the biochemical oxidation of organic matter under standard lab
procedures for 5 days at 20 °C, usually expressed as a concentration (mg/L). BOD
measurements are used to indicate the organic "strength" of wastewater
Biological Treament - Correct answer-A waste treatment process by which bacteria
and other microorganisms break down complex organic or inorganic (ie ammonia)
materials into simple, nontoxic, more stable compounds
Categorical Industrial User (CIU) - Correct answer-An industrial user (refer to IU)
that is conducting processes subject to a categorical standard promulgated by the
US EPA
centrifugal pumps - Correct answer-pumps using centrifugal force to convey
liquid. Discharge will vary according to inlet and discharge pressure
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
