AWWA, ADEM Grade 4 Operator Questions and Answers Fully Solved

AWWA, ADEM Grade 4 Operator

MCL: Fluoride - answer4.0 mg/L

MCL: Arsenic - answer.01 mg/L

MCL: Lead - answer.015 mg/L

MCL: Mercury - answer.002 mg/L

MCL: Sulfate - answer500 mg/L

MRDL Maximum Residual Disinfectant Level: Chlorine (CL2) - answer4.0 mg/L

MRDL: Chloramines - answer4.0 mg/L

MRDL: Chlorine Dioxide (CLO2) - answer.8 mg/L

MRDL: Chlorite (CLO2-) - answer1.0 mg/L

MCL: Iron (Fe) - answer.3 mg/L

MCL: Manganese (Mn) - answer.05 mg/L

MCL: Trihalomethanes (THM) - answer.08 mg/L

Year Safe Drinking Act signed into law? - answer1974

Public water system is any public or privately owned water supply system that? -
answerhas at least 15 service connections or regularly serves an average of at least 25
individuals daily at least 60 days out of the year

Community Water System defined as one that... - answerhas 15 service connections
used by all year residents or regularly serves 25 all year residents

Transient Noncommunity Water system is a system that... - answerdoes not regularly
serve drinking water to at least 25 of the same persons over 6 months per year

Single samples collected at particular places and time? - answergrab samples

Collection of individual samples obtained at regular intervals, usually every one or two
hours during a 24 hour period. - answerComposite sample

, Rate at which organisms use the oxygen in the water while stabilizing decomposable
organic matter under aerobic conditions? - answerBiochemical Oxygen Demand (BOD)

Recommended target turbidity - answer.1 NTU

Signal Transmission Methods - answer1)Mechanical 2)Pneumatic 3)Hydraulic
4)Electronic 5)Electrical

Ratio of true power passing through an electric circuit to the product of the voltage and
amperage in the circuit? - answerPower factor

Not easily penetrated - answerimpermeable

Water having a low concentration of calcium and magnesium ions - answersoft water

Formation of separate layers (of temp, plant or animal life) in a lake or reservoir? -
answerStratification

The almost spontaneous mixing of all the layers of water in a reservoir or lake when the
water temp becomes similar from top to bottom? - answeroverturn

Vertical distance, height, or energy of water above a reference point? - answerHead

Dropping or lowering of the ground surface as a result of removing excess water? -
answersubsidence

Detailed evaluation and/or inspection of a source of water supply and all conveyances,
storage, treatment and distribution facilities to ensure protection of the water supply
from all pollution sources. - answerSanitary Survey

Detailed description of all underground features discovered during the drilling of a well
(depth, thickness and type of the formations). - answerGeological Log

Natural factors that may effect the quality of water... - answer1) Climate
2)Watershed/Drainage 3)Wildfires 4)Reservoir Area

Method of treating water which consists of the addition coagulate chemicals, flash
mixing, coagulation, minimal flocculation. Flocculation may be omitted.. - answerDirect
filtration

Addition of coagulate chemicals, flash mixing, coagulate-flocculation, sedimentation and
filtration - answercomplete treatment or conventional filtration

Deep lakes that do not freeze/undergo a single stratification/destratification cycle? -
answerMonomictic