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Drinking Water Treatment Operator Class 1- Questions & Answers
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Drinking Water Treatment Operator Class 1- Questions& Answers
If a customer complains about the drinking water characteristics, the operator
should record the complaint and... Correct Ans - Investigate
immediately
What term is used when a water utility divides its total operating expenses
into a total revenue? Correct Ans - Operating ratio
How often should data, such as flow rate, amount of water treated, dosage of
chemical, and reservoir levels be recorded? Correct Ans - Daily
Under the requirements of the Safe Water Drinking Act, it is the duty of the
water purveyor to deliver potable water of proper quantity only as far as the...
Correct Ans - Consumer's tap inside the home
According to the Safe Drinking Water Act, the basic definition of a public
water supply system is any water system that supplies water for human
consumption that serves.... Correct Ans - 15 service connections or
over 25 persons for over 60 days a year
What agent is responsible for reporting lab results to the regulatory agency?
Correct Ans - Water system owner
What causes water to moves through pores in the soil & rocks? Correct
Ans - Gravity
Disease producing bacteria are called ? Correct Ans - Pathogens
What are the two main causes of hardness in water? Correct Ans -
Calcium & Magnesium
What device measures the flow rate of gases? Correct Ans - Rotameter
Excessive internal pressure, which may be several times the normal operating
pressure and can seriously damage hydropneumatic tanks, valves, and piping
network? Correct Ans - Water Hammer
, Most pumps must be primed before startup in order to... Correct Ans -
Start the flow of water
What is the purpose of a check valve? Correct Ans - Act as an
automatic shutoff valve when the pump stops
Which form of hypochlorite is the most dangerous to handle? Correct Ans
- Calcium
What type of fire extinguisher should be used for fires with live electricity
present? Correct Ans - Class C
Documents that provide a profile of hazardous material? Correct Ans -
MSDS
What is the purpose of a pump guard? Correct Ans - Protects
operators from rotating parts
The major source of error when obtaining water quality info is improper...
Correct Ans - Sampling
A composite sample should never be used when sampling for... Correct
Ans - Bacteria
How many coliform samples are required per month for a water system
serving a population between 25 & 100? Correct Ans - 1
Water laboratory test calculations and results use which system? Correct
Ans - Metric
Factors of what number are used in the metric system? Correct Ans -
10
What is the most common method used in labs for total coliform & E. coli?
Correct Ans - Colilert
Test method that best determines chemical feed/dosage rates? Correct
Ans - Jar test
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