CWEA Grade 4 Test questions and answers 2025\2026
A+ Grade
AA
- correct answer atomic absorption
AC
- correct answer power alternating current
ac
- correct answer acre
AF
- correct answer acre-foot (feet)
AFY
- correct answer acre-foot per year
AMSA
- correct answer Association of Metropolitan Sewerage
Agencies
ANSI
- correct answer American National Standards Institute
APHA
- correct answer American Public Health Association
AS
- correct answer activated sludge
,ASCE
- correct answer American Society of Civil Engineers
ASME
- correct answer American Society of Mechanical
Engineers
ASTM
- correct answer American Society for Testing and
Materials
AWT
- correct answer advanced wastewater treatment
AWWA
- correct answer American Water Works Association
BECP
- correct answer Business Emergency and
Contingency Plan
BNR
- correct answer biological nutrient removal
BOD5
- correct answer biochemical oxygen demand after
5 days
BTU
- correct answer British thermal unit
, C
- correct answer Celsius
Cal-OSHA
- correct answer California Occupational Safety and
Health Act
Cal-EPA
- correct answer California Environmental Protection
Administration
CBOD
- correct answer carbonaceous biochemical oxygen
demand
CCE
- correct answer carbon chloroform extract
CCR
- correct answer California Code of Regulations
cf
- correct answer cubic feet (foot)
CFR
- correct answer Code of Federal Regulations
cfs
- correct answer cubic feet per second
CH4
- correct answer Methane
A+ Grade
AA
- correct answer atomic absorption
AC
- correct answer power alternating current
ac
- correct answer acre
AF
- correct answer acre-foot (feet)
AFY
- correct answer acre-foot per year
AMSA
- correct answer Association of Metropolitan Sewerage
Agencies
ANSI
- correct answer American National Standards Institute
APHA
- correct answer American Public Health Association
AS
- correct answer activated sludge
,ASCE
- correct answer American Society of Civil Engineers
ASME
- correct answer American Society of Mechanical
Engineers
ASTM
- correct answer American Society for Testing and
Materials
AWT
- correct answer advanced wastewater treatment
AWWA
- correct answer American Water Works Association
BECP
- correct answer Business Emergency and
Contingency Plan
BNR
- correct answer biological nutrient removal
BOD5
- correct answer biochemical oxygen demand after
5 days
BTU
- correct answer British thermal unit
, C
- correct answer Celsius
Cal-OSHA
- correct answer California Occupational Safety and
Health Act
Cal-EPA
- correct answer California Environmental Protection
Administration
CBOD
- correct answer carbonaceous biochemical oxygen
demand
CCE
- correct answer carbon chloroform extract
CCR
- correct answer California Code of Regulations
cf
- correct answer cubic feet (foot)
CFR
- correct answer Code of Federal Regulations
cfs
- correct answer cubic feet per second
CH4
- correct answer Methane
