ILLINOIS_CLASS_D_WATER_LICENSE_EXAMINATION_2024_ACTUAL_QUESTIONS

ILLINOIS CLASS D WATER LICENSE
EXAMINATION 2024 ACTUAL QUESTIONS
WITH CORRECT VERIFIED ANSWERS
◉ Hydrogen Sulfide (H2S) Answer: Gas, Corrosive, Rotten Egg


◉ Iron (Fe) Answer: Primary MCL 1.0 mg/L
Secondary MCL 0.3 mg/L. (Customer Complaints)
- Problems will start above 0.3 mg/L like color, staining, taste and odor,
iron bacteria.
- CAN BE SEQUESTERED/ NOT A HEALTH RISK


◉ Lead (Pb) Answer: Brain damage to children, Hyper tension in adults
-Cannot exceed Primary MAC .015 mg/L
- MAC .05 mgL
- Action level 0.015 mg/L


◉ Magnesium (Mg) Answer: Contributes to hardness


◉ Maganese (Mn) Answer: Primary MCL .15 mg/L
Secondary MCL .05 mg/L
- Problems will start occurring above ,05 mg/L, like black, brown water,
staining, taste and odor

, - CAN BE SEQUESTERED
- NOT A HEALTH RISK


◉ Nitrate (NO3) Answer: MCL 10.0 mg/L
High levels can cause blue babies, infant suffocation, Methoglobnemia


◉ Trihalomethanes (THM) Answer: MCL .08 mg/L
- Cancer Causing
- Cl2 + Organic acids


◉ Methane (CH4) Answer: Natural gas, Explosive


◉ Sulfate (SO4) Answer: High levels can cause diarrhea


◉ Water related disease Answer: Cholera, Typhoid Fever, Guardia
(Diarrhea for months), Dystentery, Cryptosporidium (Diarrhea for
WEEKS), Hepatitis


◉ Pathogens Answer: Disease causing bacteria and viruses, NOT ALL
BACTERIA ARE PATHOGENS, from human and animal feces


◉ Coliform Bacteria Answer: An indicator bacteria (of pathogens),
easier to test for.