WATER TREATMENT OIT TEST 300 COMPREHENSIVE WATER TREATMENT OPERATOR-IN-TRAINING STUDY GUIDE 2026

WATER TREATMENT OIT TEST 300
COMPREHENSIVE WATER TREATMENT
OPERATOR-IN-TRAINING STUDY GUIDE 2026

◉ 0.06 ppm.
Answer: MCL for HAA5's


◉ 0.01 ppm.
Answer: MCL for Arsenic


◉ 0.015 ppm.
Answer: MCL for Lead


◉ 90 days.
Answer: Turbidity meter must be calibrated every:


◉ Less than 0.3 for 95% of the time..
Answer: MCL for turbidity is


◉ 2 buffers.
Answer: pH meters must be calibrated using

,◉ Algae blooms.
Answer: A grassy of fishy taste in reservoir water indicates


◉ Improper backwashing of filters.
Answer: Mudballs are caused by


◉ Carbonate.
Answer: Lime can only be used to soften water with


◉ 0 ppm.
Answer: Water leaving Zeolite softener has a hardness of


◉ Schmutzdecke.
Answer: The top layer of a slow sand filter is called the


◉ Coagulation, flocculation, sedimentation.
Answer: A solids contact unit combines


◉ 4 ppm, 2 ppm.
Answer: The PMCL for fluoride is: The SMCL is:

, ◉ Warmer.
Answer: Flock will settle better in warm or cool water?


◉ High pH.
Answer: The greensand manganese removal process requires a:


◉ Volatile organic compounds & gases (odor).
Answer: Aeration releases what from water?


◉ Amperomatic tiration.
Answer: The most accurate method of determining chlorine residual
is:


◉ Sulfuric acid.
Answer: An alkalinity sample is titrated using


◉ Mixing and measuring.
Answer: A beaker is used for


◉ Nephelometric turbidity units.
Answer: NTU stands for: