ILLINOIS EPA C CLASS WATER
LICENSE EXAM 2026 LATEST
UPDATE QUESTIONS AND
CORRECT VERIFIED ANSWERS
ALREADY GRADEDE A+
Fe - ANS-Iron
Pb - ANS-Lead
Mg - ANS-Magnesium
Mn - ANS-Manganese
No3 - ANS-Nitrate
THM - ANS-Trihalomethanes
CH4 - ANS-Methane
SO4 - ANS-Sulfate
What are some water related diseases? - ANS-Typhoid fever, Guardia,
Cryptosporidium, Hepatitis
When must a boil order be passed out? - ANS-When the main goes
below 20 PSI
, The definition of a public water supply is? - ANS-15 service
connections, or serving at least 25 persons for at least 60 days
H2O - ANS-Water
Cl2 - ANS-Chlorine
1 PSI = ? FT - ANS-2.31 FT
Cathodic Protection - ANS-Prevents Corrosion
What is C-Factor? - ANS-Roughness of Inner pipe (140+ Required)
Types of Water Main - ANS-Grey Sand Cast, Asbestos, Steel Pipe, Plastic,
Ductile Iron, Concrete Pipe
Types of Water Service Lines - ANS-Copper, PVC
What is the standard service line size? - ANS-1"
How far should a Water line be from a Sewer Line? - ANS-10' horizontal
and 18" vertical unless in water main quality casing
When is shoring needed? - ANS-5' deep or more
What chemicals can you use to disinfect a water main? - ANS-CL2 Gas or
Liquid, NaOCL - Sodium Hypochlorite, Ca(OCL)2 - Calcium Hypochlorite
LICENSE EXAM 2026 LATEST
UPDATE QUESTIONS AND
CORRECT VERIFIED ANSWERS
ALREADY GRADEDE A+
Fe - ANS-Iron
Pb - ANS-Lead
Mg - ANS-Magnesium
Mn - ANS-Manganese
No3 - ANS-Nitrate
THM - ANS-Trihalomethanes
CH4 - ANS-Methane
SO4 - ANS-Sulfate
What are some water related diseases? - ANS-Typhoid fever, Guardia,
Cryptosporidium, Hepatitis
When must a boil order be passed out? - ANS-When the main goes
below 20 PSI
, The definition of a public water supply is? - ANS-15 service
connections, or serving at least 25 persons for at least 60 days
H2O - ANS-Water
Cl2 - ANS-Chlorine
1 PSI = ? FT - ANS-2.31 FT
Cathodic Protection - ANS-Prevents Corrosion
What is C-Factor? - ANS-Roughness of Inner pipe (140+ Required)
Types of Water Main - ANS-Grey Sand Cast, Asbestos, Steel Pipe, Plastic,
Ductile Iron, Concrete Pipe
Types of Water Service Lines - ANS-Copper, PVC
What is the standard service line size? - ANS-1"
How far should a Water line be from a Sewer Line? - ANS-10' horizontal
and 18" vertical unless in water main quality casing
When is shoring needed? - ANS-5' deep or more
What chemicals can you use to disinfect a water main? - ANS-CL2 Gas or
Liquid, NaOCL - Sodium Hypochlorite, Ca(OCL)2 - Calcium Hypochlorite
